Powder Metallurgy and Metal Ceramics最新文献

{"title":"Temperature and Composition Ranges of FCC HEA Existence in the Cu–Cr–Fe–Co–Ni System I. Database and Results of Calculations for Boundary Quaternary Systems","authors":"M. A. Turchanin,&nbsp;P. G. Agraval,&nbsp;A. O. Vodopyanova,&nbsp;M. V. Bulanova,&nbsp;I. V. Fartushna","doi":"10.1007/s11106-026-00552-1","DOIUrl":"10.1007/s11106-026-00552-1","url":null,"abstract":"<p>A thermodynamic database for the liquid (L), fcc (A1), and bcc (A2) phases of the Cu–Cr–Fe–Co–Ni system was developed using the CALPHAD method. The database includes model parameters for the thermodynamic mixing functions of binary and ternary boundary systems. The database was developed to model the temperature and composition ranges for high-entropy fcc alloys existing in the Cu–Cr–Fe–Co–Ni system at temperatures exceeding 1000 K. As a first application, phase diagrams for boundary quaternary systems were calculated, and it was shown that each of them was characterized by fcc fields extending in temperature and composition. In the Cu–Fe–Co–Ni system, the fcc phase undergoes binodal decomposition, and the formed two-phase region grows with decreasing temperature, occupying most of the composition tetrahedron. In the Cr–Fe–Co–Ni composition space, the fcc phase is predominant, while the bcc and fcc + bcc regions are located along the Cr–Fe edge. In quaternary systems containing copper, conditions exist for the separation of equilibrium and supercooled melts over a wide composition range. The results of the calculations indicate the potential of the examined systems for producing single-phase high-entropy alloys, precipitation-strengthened alloys, and composite materials with a frozen emulsion structure.</p>","PeriodicalId":742,"journal":{"name":"Powder Metallurgy and Metal Ceramics","volume":"64 9-10","pages":"615 - 628"},"PeriodicalIF":0.8,"publicationDate":"2026-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermodynamic Properties of Cu–Lu and Al–Cu–Lu Melts","authors":"L. O. Romanova,&nbsp;V. G. Kudin,&nbsp;M. I. Ivanov,&nbsp;N. V. Podoprigora,&nbsp;V. S. Sudavtsova","doi":"10.1007/s11106-026-00553-0","DOIUrl":"10.1007/s11106-026-00553-0","url":null,"abstract":"<p>Isoperibolic calorimetry was employed for the first time to study the mixing enthalpies of Al–Lu–Cu melts along four radial sections with <i>x</i>_Al/<i>x</i>_Lu = 0.42/0.58 and 0.76/0.24 and with <i>x</i>_Cu/<i>x</i>_Lu = 0.35/0.65 and 0.7/0.3 at 1780 ± 3 K. When aluminum was added to the Cu_<i>x</i>Lu_1–<i>x</i> melts, the thermal effect of its dissolution increased. This was due to the formation of strong bonds between aluminum and lutetium. In the other two sections, on the contrary, when copper was added to the Al_<i>x</i>Lu_1–<i>x</i> melts, the strong bonds between aluminum and lutetium were broken. Therefore, the integral mixing enthalpies of these melts hardly changed up to <i>x</i>_Cu = 0.4. Using the formation enthalpies for liquid alloys and compounds in the Cu–Lu system known from the literature, all thermodynamic properties of melts, associates in melts, and intermetallics were optimized and calculated with the ideal associated solution (IAS) model. The calculated activities of components in melts of this system exhibited moderate negative deviations from ideal solutions. The IAS model was also used to calculate temperature–composition dependences of the Gibbs energies, enthalpies, and entropies of formation for melts and temperature dependences for intermetallics to further determine the liquidus curve of the system phase diagram. As a result, complete information was obtained on the thermodynamic properties of all phases and the liquidus curve of the Cu–Lu phase diagram, which agrees with the one known from the literature. The reliable thermochemical properties of melts in the boundary binary Al(Cu)–Lu and Al–Cu–Lu subsystems were presented as Redlich–Kister polynomials to calculate the same data for the studied ternary melts with the analytical Redlich–Kister–Muggianu model. Comparison of the measured and calculated mixing enthalpies for these melts showed that our data and those found with the analytical Redlich–Kister–Muggianu model without the ternary contribution were consistent within the experimental error. The extreme value of the integral molar enthalpy of melts in the ternary Al–Cu–Lu system was –37 ± 4 kJ/mol and corresponded to the Al_0.6Lu_0.4 melt, i.e., the boundary Al–Lu subsystem provided the main contribution to the interaction energy between dissimilar atoms in these ternary melts.</p>","PeriodicalId":742,"journal":{"name":"Powder Metallurgy and Metal Ceramics","volume":"64 9-10","pages":"629 - 640"},"PeriodicalIF":0.8,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Information on the Annual Report of the Ukrainian Commission of Phase Diagrams and Thermodynamics (2025)","authors":"M. A. Turchanin,&nbsp;K. Ye. Korniyenko","doi":"10.1007/s11106-026-00555-y","DOIUrl":"10.1007/s11106-026-00555-y","url":null,"abstract":"<p>The Alloy Phase Diagram International Commission (APDIC) was established in 1986 in Orlando, Florida, USA, pursuant to a Memorandum of Understanding. As of 2025, 18 representatives from 27 countries around the world participated in APDIC activities. APDIC members independently carry out their individual scientific programs and participate in annual meetings to discuss pressing issues related to coordinating their activities. Since 1994, the Ukrainian Phase Diagrams and Thermodynamics Commission has been an integral part of APDIC. As part of the Ukrainian Commission's annual report, at the APDIC meeting on May 30, 2025, information was presented on the results of Ukrainian scientists' activities in this field in 2024. It is presented in the form of a table with data on the studied systems and the obtained results, along with a list of references to published papers. Scientists from the Frantsevich Institute for Problems of Materials Science (National Academy of Sciences of Ukraine, Kyiv), Taras Shevchenko National University of Kyiv (Ministry of Education and Science of Ukraine, Kyiv), and Donbas State Engineering Academy (Ministry of Education and Science of Ukraine, Kramatorsk) provided relevant information to the Ukrainian Commission.</p>","PeriodicalId":742,"journal":{"name":"Powder Metallurgy and Metal Ceramics","volume":"64 9-10","pages":"650 - 654"},"PeriodicalIF":0.8,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multicomponent Alloys of the ZrNiMnCr(V) System for Chemical Current Sources I. Influence of Vanadium on the Phase Composition, Structure, and Electrochemical Activity","authors":"Yu. M. Solonin,&nbsp;O. Z. Galiy,&nbsp;K. O. Graivoronska,&nbsp;A. V. Samelyuk","doi":"10.1007/s11106-026-00554-z","DOIUrl":"10.1007/s11106-026-00554-z","url":null,"abstract":"&lt;p&gt;X-ray diffraction was employed to examine the phase composition and determine the amount of a specific phase (quantitative phase composition) in the ZrNi&lt;sub&gt;1.2&lt;/sub&gt;Mn&lt;sub&gt;0.5&lt;/sub&gt;Cr&lt;sub&gt;0.3&lt;/sub&gt; (1), ZrNi&lt;sub&gt;1.2&lt;/sub&gt;Mn&lt;sub&gt;0.5&lt;/sub&gt;Cr&lt;sub&gt;0.2&lt;/sub&gt;V&lt;sub&gt;0.1&lt;/sub&gt; (2), ZrNi&lt;sub&gt;1.2&lt;/sub&gt;Mn&lt;sub&gt;0.45&lt;/sub&gt;Cr&lt;sub&gt;0.2&lt;/sub&gt;V&lt;sub&gt;0.15&lt;/sub&gt; (3), ZrNi&lt;sub&gt;1.2&lt;/sub&gt;Mn&lt;sub&gt;0.4&lt;/sub&gt;Cr&lt;sub&gt;0.2&lt;/sub&gt;V&lt;sub&gt;0.2&lt;/sub&gt; (4), and ZrNiMn&lt;sub&gt;0.5&lt;/sub&gt;Cr&lt;sub&gt;0.2&lt;/sub&gt;V&lt;sub&gt;0.5&lt;/sub&gt; (5) alloys. The dependence of the quantitative phase composition on the chemical composition of the alloys, on the vanadium amount in our case, was established. Alloys 1–4 with a lower vanadium content (~2.5–5 wt.%) consisted of four phases: C15, C14, Zr&lt;sub&gt;7&lt;/sub&gt;Ni&lt;sub&gt;10&lt;/sub&gt;, and Zr&lt;sub&gt;9&lt;/sub&gt;Ni&lt;sub&gt;11&lt;/sub&gt;. Alloy 5, with the highest vanadium content (~12 wt.%), consisted of the same phases, except for Zr&lt;sub&gt;7&lt;/sub&gt;Ni&lt;sub&gt;10&lt;/sub&gt;. With growing vanadium amount in the alloy, the total content of the main phases, C15 and C14, increased (from ~70 to 95 vol.%) and the amount of the Zr&lt;sub&gt;7&lt;/sub&gt;Ni&lt;sub&gt;10&lt;/sub&gt; phase decreased (from ~28 to 0 vol.%) until it disappeared in alloy 5. The microstructure of two alloys (1 and 5) was analyzed in detail. According to X-ray diffraction, these alloys were characterized, respectively, by the largest and smallest content of secondary phases (Zr&lt;sub&gt;7&lt;/sub&gt;Ni&lt;sub&gt;10&lt;/sub&gt; + Zr&lt;sub&gt;9&lt;/sub&gt;Ni&lt;sub&gt;11&lt;/sub&gt;). To determine the elemental composition of typical (three) structural sections, integral and point analyses were carried out by energy-dispersive X-ray spectroscopy (EDX), whose results agreed well with X-ray diffraction. The elemental content of the alloys, calculated using local EDX for different points in the structure, was presented as formulas of all phases identified by metallographic analysis. To assess the ratio between the number of Laves phases and secondary phases and their mutual arrangement, contrast structural images were obtained by computer processing of metallographic data for alloys 1 and 5, which allowed the ratio of the specified phases to be analyzed automatically. The contrast images clearly showed that the layers of the dark phase (Laves phase) penetrated the areas (white) of the secondary phases, thus creating a large interfacial surface and facilitating the diffusion of hydrogen into the inner layers. The hydrogen sorption properties of electrodes produced from alloys 1–5 were studied. With a higher total amount of Laves phases with C15 and C14 structures at a temperature of 25°C and a discharge current of 50 mA/g, the maximum discharge capacity did not increase for all alloys. The minimum discharge capacity, 210 mA · h/g, was shown by the electrode from alloy 1 with the minimum amount of the C15 and C14 phases (~70 vol.%), and the maximum discharge capacity, 255 and 265 mA · h/g, was exhibited by the electrodes from alloys 2–3 (81–82 vol.%, respectively). When this phase reached 84 vol.%, the discharge capaci","PeriodicalId":742,"journal":{"name":"Powder Metallurgy and Metal Ceramics","volume":"64 9-10","pages":"641 - 649"},"PeriodicalIF":0.8,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of Lattice Parameter and Distortion on the Mechanical Properties of Metallic Coatings Produced from High-Entropy Alloys","authors":"V. F. Horban","doi":"10.1007/s11106-026-00551-2","DOIUrl":"10.1007/s11106-026-00551-2","url":null,"abstract":"<p>A new class of materials—high-entropy alloys—is characterized by the presence of atoms with different properties in the absence of a dominant element. In accordance with the self-organization law, this should give rise to new relationships that are unique to high-entropy alloys. The high hardness of high-entropy alloys prompted research into their properties in coatings. The hardness of high-entropy metallic coatings reaches nearly 20 GPa. The mechanical properties of as-cast high-entropy alloys are influenced by lattice distortion (resulting from differences in the atomic radii of elements) and lattice parameter. The relationship between the lattice parameter and distortion and the elastic modulus, hardness, and normalized hardness of high-entropy alloys was analyzed in both as-cast alloys and metallic coatings. The dependence of the elastic modulus and hardness on the lattice parameter was established for as-cast alloys and associated coatings. Coatings with a bcc phase exhibit a slight decrease in the lattice parameter compared with the as-cast state. This is accompanied by a proportional increase in the elastic modulus. At the same time, the elastic modulus of fcc-phase coatings approaches the value found with the rule of mixture as the lattice parameter decreases to the calculated value. The absence of a proportional relationship between the hardness and distortion in as-cast alloys and metallic coatings was demonstrated. The effect of distortion on the normalized hardness (the ratio of hardness to effective elastic modulus) was identified for as-cast alloys. Increasing distortion was found to decrease the hardness ratio between the coating and the as-cast alloy. This is likely associated with the influence of distortion on the nanograin size in the deposition process.</p>","PeriodicalId":742,"journal":{"name":"Powder Metallurgy and Metal Ceramics","volume":"64 9-10","pages":"608 - 614"},"PeriodicalIF":0.8,"publicationDate":"2026-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Densification of Binder Jet-printed Silicon Carbide Ceramics by Cyclic Post-Impregnation Without Cyclic Pyrolysis","authors":"Zhenxiang Chen,&nbsp;Yuhong Chen,&nbsp;Chaofan He,&nbsp;Wanxiu Hai,&nbsp;Jiwei Cao,&nbsp;Yunyun Zhang","doi":"10.1007/s11106-026-00549-w","DOIUrl":"10.1007/s11106-026-00549-w","url":null,"abstract":"<p>The binder-jet forming technique, combined with a simplified phenolic resin impregnation process, was used to prepare high-performance silicon carbide ceramics. The carbon enhancement process was explored using a pre-mixed phenolic resin and cyclic impregnation, while cyclic pyrolysis was replaced by a baking process at 120ºC. The effects of different printing powders and impregnation cycles on the molding accuracy, density, residual silicon content, thermal conductivity, and mechanical properties of the samples were systematically investigated. The results showed that the printed density was 1.53 g/cm³, with a carbon density of 0.55 g/cm³. The phenolic resin impregnation treatment effectively filled the internal pores, further increasing the green body density to 1.71 g/cm³ and the carbon density to 0.71 g/cm³. The density of the SiC ceramics obtained by the silicone infiltration process reached 2.93 g/cm³, the thermal conductivity was 151.8 W/(m · K), and the flexural strength was 241 ± 14.08 MPa. Overall, cyclic post-impregnation of phenolic resin without the pyrolysis process can effectively enhance the density and properties of binder-injected SiC ceramics.</p>","PeriodicalId":742,"journal":{"name":"Powder Metallurgy and Metal Ceramics","volume":"64 9-10","pages":"571 - 580"},"PeriodicalIF":0.8,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Process Parameters on the Structure and Properties of a Creep-resistant Nickel-based Superalloy Produced by Hot Forging of Porous Billets","authors":"G. A. Bagliuk,&nbsp;O. I. Tolochyn,&nbsp;V. I. Danylenko,&nbsp;I. Yu. Okun,&nbsp;S. F. Kyryliuk,&nbsp;O. V. Tolochyna","doi":"10.1007/s11106-026-00546-z","DOIUrl":"10.1007/s11106-026-00546-z","url":null,"abstract":"<p>The fabrication route for nickel-based powder alloy samples included hot forging of porous compacts using a screw press at temperatures ranging from 950 to 1220°C, followed by vacuum annealing of the forged billets at 1210°C for 1 and 4 h. At relatively low hot forging temperatures (950–1050°C), significant residual volumetric porosity (12.5–6.5%) remained within the forged billets. In addition, two-dimensional defects (planar pores of zero volume) were identified in the microstructure. These defects formed along grain boundaries through their decoration with fine oxide (Al₂O₃ and TiO₂) and carbide (NbC, TiC, etc.) inclusions. Increasing the forging temperature to 1150–1220°C was found to minimize planar porosity and produce nearly fully dense material with high-quality intergranular contact surfaces. Analysis of the results also demonstrated that increasing the forging temperature from 950 to 1150°C was accompanied by a decrease in electrical resistivity and improvement in mechanical properties, while further temperature rise did not significantly enhance the mechanical properties. At deformation temperatures above 1150°C, the highest density and the lowest residual defect content were achieved. The strength and fracture toughness increased after heat treatment and with longer holding times compared to the forged samples. The materials produced by hot forging at 1150 and 1220°C exhibited relatively high creep resistance: the compressive yield stress at 700°C reached 700–800 MPa and the ultimate strength exceeded 2000 MPa.</p>","PeriodicalId":742,"journal":{"name":"Powder Metallurgy and Metal Ceramics","volume":"64 9-10","pages":"535 - 549"},"PeriodicalIF":0.8,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of Microfibers and Nanofibers on a Nickel Foam Substrate","authors":"P. M. Sylenko,&nbsp;D. I. Andrushchenko,&nbsp;G. S. Oleynyk,&nbsp;K. O. Graivoronska,&nbsp;I. Yu. Okun,&nbsp;Yu. M. Solonin","doi":"10.1007/s11106-026-00548-x","DOIUrl":"10.1007/s11106-026-00548-x","url":null,"abstract":"<p>The synthesis of SiC micro- and nanofibers by chemical vapor deposition (CVD) from methyltrichlorosilane CH₃SiCl₃ on highly porous nickel foam substrates (matrices) was examined. The synthesis was conducted over the temperature range 1000–1200°C for 10 to 60 min. The dependence of nickel foam pore filling on synthesis temperature and time was established. The time dependence of the substrate weight gain resulting from the deposition of SiC nanofibers at constant temperature was linear. The weight gain increased exponentially with temperature at fixed holding time. The effective activation energy of the process was estimated at E_a = 107 kcal/mol (447 kJ/mol). This corresponds to the case when the decomposition of methyltrichlorosilane and the nucleation and growth of the SiC crystalline phase as nanofibers are the limiting stages in the process. According to X-ray diffraction, the fibers have a cubic β-SiC structure with lattice parameter a = = 0.4349 nm. This is also confirmed by selected-area electron diffraction patterns for nanofiber clusters taken using transmission electron microscopy. Silicon carbide nanofibers with diameters ranging from 40 to 200 nm (depending on synthesis temperature) have smooth surfaces. Among the predominant cylindrical fibers, fibers with a triangular cross-section are also observed. The two types of SiC nanofibers differ by the presence of twins in the first case and polytypes and stacking faults in the second, which is confirmed by the characteristic striped contrast in electron microphotographs and by the regular shift of reflections and streaking in electron diffraction patterns. Recommendations are formulated for the use of these composite nanostructures, namely SiC nanofibers spatially distributed in the pores of nickel foam, as catalyst carriers, fine filters for liquids and gases, and matrices for polymer-based nanofiber-reinforced composites.</p>","PeriodicalId":742,"journal":{"name":"Powder Metallurgy and Metal Ceramics","volume":"64 9-10","pages":"561 - 570"},"PeriodicalIF":0.8,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrosion and Biological Behaviour of Magnesium-based Biocomposites","authors":"Manmeet Singh,&nbsp;Sandeep Singh,&nbsp;Neeraj Sharma","doi":"10.1007/s11106-026-00550-3","DOIUrl":"10.1007/s11106-026-00550-3","url":null,"abstract":"<p>For biodegradable implants, magnesium (Mg) alloys are promising materials due to several advantages, including reduced implant stress and the elimination of the need for a secondary surgery. However, deterioration in the simulated body fluid (SBF) may disintegrate the magnesium, leading to implant failure, which is the main challenge that compromises the mechanical integrity and functional life of the implant. To address this issue, research has been conducted on the development of Mg-based composites incorporating various bioactive ceramic particle reinforcements. The addition of ceramic particles as reinforcements, viz.: bioactive glass (BG), fluorapatite (FA), zinc oxide (ZnO), hydroxyapatite (HAp), β-tricalcium phosphate (β-TCP), titanium dioxide (TiO₂), and magnesium oxide (MgO), represents the potential to improve corrosion resistance, biological interaction, and mechanical performance. This review provides an overview of magnesium-based biocomposites for medical applications, with a particular focus on the role of ceramic particles in controlling degradation behavior. The article discusses the evolution of biodegradable implant materials (biomaterials), different reinforcements, the corrosion mechanism of Mg-based materials, and their biocompatibility in simulated body fluid. Also, the effects of different reinforcements on mechanical characteristics, microstructure, and corrosion resistance are analyzed. The review also highlights current challenges: controlling the degradation rate and maintaining mechanical strength during healing. Finally, future research directions for advanced Mg-based biocomposites for biomedical and orthopedic applications are outlined.</p>","PeriodicalId":742,"journal":{"name":"Powder Metallurgy and Metal Ceramics","volume":"64 9-10","pages":"581 - 607"},"PeriodicalIF":0.8,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Densification Behavior and Microstructures of β-Si3N4/O'-SiAlON Composites Prepared by Spark Plasma Sintering","authors":"Yi-Chi Huang,&nbsp;Alex C. H. Lee,&nbsp;Horng-Hwa Lu,&nbsp;Jow-Lay Huang","doi":"10.1007/s11106-026-00547-y","DOIUrl":"10.1007/s11106-026-00547-y","url":null,"abstract":"<p>Nanoscale Si₃N₄ powder facilitates densification at lower sintering temperatures, allowing sintered bodies to more readily approach theoretical density and achieve nanoscale microstructures. In this study, amorphous nanoscale Si₃N₄ powder was used as the starting material and consolidated via spark plasma sintering (SPS) at a heating rate of 100°C/min to investigate the effects of rapid sintering on phase ratio, microstructure, and mechanical properties. A fully densified 62% Si₃N₄/38% O'-SiAlON composite ceramic can be achieved in 16 min. These characteristics were also compared with those of samples prepared by hot pressing at a heating rate of 10°C/min. At a sintering temperature of 1800°C, the β-Si₃N₄ phase dominated in both methods. SPS promoted the formation of elongated rod-like grains while preserving a submicron matrix, thereby increasing the aspect ratio. Consequently, the SPS method not only improved the toughness of the Si₃N₄-based composites but also maintained high hardness due to the strong matrix.</p>","PeriodicalId":742,"journal":{"name":"Powder Metallurgy and Metal Ceramics","volume":"64 9-10","pages":"550 - 560"},"PeriodicalIF":0.8,"publicationDate":"2026-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}