Journal of Materials Science最新文献

{"title":"One-minute mechanistical synthesis of bimetallic Cu/Zn-MOF-74 for rapid and high-capacity Sr2+ removal from radioactive wastewater","authors":"Lihan Wen,&nbsp;Juan Shen,&nbsp;Shuangxian Wu,&nbsp;Bo Jin","doi":"10.1007/s10853-026-13770-0","DOIUrl":"10.1007/s10853-026-13770-0","url":null,"abstract":"<div><p>Radioactive strontium (⁹⁰Sr) contamination in water bodies poses one of the most persistent and serious threats to both ecological safety and public health, owing to its long half-life, high environmental mobility, and strong propensity for biological accumulation. However, a rapid and sustainable synthetic route for bimetallic MOF-74 with high Sr²⁺ adsorption capacity remains lacking. This study reports a solvent‑free mechanochemical strategy for the synthesis of a bimetallic Cu/Zn-MOF-74 (CZ-M74-11) using a spiral gas-solid flow (S-GSF) method in just 1 min. The material achieves 98.26% Sr²⁺ removal within 15 min and exhibits a maximum Langmuir adsorption capacity of 295.13 mg·g⁻¹ at 303.15 K. Kinetic and thermodynamic analyses indicate that the adsorption is spontaneous and exothermic. XPS and FT-IR analyses, together with cyclic desorption data, reveal that Sr²⁺ uptake proceeds primarily through outer-sphere complexation, with a minor contribution from inner‑sphere coordination involving carboxylate groups. This work addresses the gap in rapid and sustainable routes for bimetallic MOF-74 synthesis by introducing an S-GSF method that achieves excellent adsorption capacity and ultrafast kinetics for Sr²⁺ removal.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"61 44","pages":"34779 - 34794"},"PeriodicalIF":4.4,"publicationDate":"2026-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149162957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneous strength–ductility enhancement in AZ31B magnesium matrix composites via micro-nano dual-scale Cu/SiC hybrid reinforcement coupled with ball milling and friction stir processing","authors":"Yitong Sun,&nbsp;Xianyong Zhu,&nbsp;Ke Zhang,&nbsp;Zikun Wang,&nbsp;Xiong Xiao,&nbsp;Jinliang Zhang,&nbsp;Song Yang","doi":"10.1007/s10853-026-13828-z","DOIUrl":"10.1007/s10853-026-13828-z","url":null,"abstract":"<div><p>To overcome the intrinsic strength–ductility trade-off of magnesium matrix composites (MMCs) and achieve simultaneous improvement of mechanical performance, this study puts forward a novel preparation route with micro-nano dual-scale hybrid particle reinforcements. AZ31B MMCs reinforced by micro Cu and nano SiC particles were manufactured by solid-state ball-milling (BM) pretreatment coupled with multi-pass friction stir processing (FSP). Microstructure and elemental distribution were characterized by OM, SEM, XRD, and EDS. Ductile micro Cu particles may serve as potential heterogeneous nucleation sites to facilitate dynamic recrystallization (DRX). Nano SiC particles are expected to exert grain-boundary pinning effects, contributing to grain refinement. Mutual obstruction between dual-scale particles restrains particle agglomeration frequently seen in single-reinforced composites. Combined grain refinement, Orowan strengthening, load transfer, and thermal mismatch jointly contribute to the observed simultaneous enhancement of strength and ductility. The composite with a nominal addition of 5 wt% Cu and 10 wt% SiC shows the highest ultimate tensile strength (UTS) × elongation (El) product among all tested samples, with a UTS of 230.3 MPa, El of 21.6%, and micro-Vickers hardness of 58.8 HV. Compared with the as-rolled AZ31B, UTS, El, and hardness increase by 21.1%, 43.0% and 9.3%, respectively; relative to the groove-free FSPed AZ31B baseline, UTS and El are improved while hardness is slightly lower. This hybrid reinforcement design integrates complementary advantages of different-scale particles, breaks the performance bottleneck of single-reinforcement systems, achieves simultaneous improvement of strength and ductility, and supplies a reliable, scalable method to fabricate high-performance lightweight MMCs with adjustable mechanical properties.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"61 43","pages":"34315 - 34343"},"PeriodicalIF":4.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microstructural evolution and dynamic recrystallization mechanism of 347H heat-resistant steel","authors":"Jun Xiao,&nbsp;Siyu Qiu,&nbsp;Aimin Zhao","doi":"10.1007/s10853-026-13803-8","DOIUrl":"10.1007/s10853-026-13803-8","url":null,"abstract":"<div><p>The microstructural evolution of 347H heat-resistant steel during hot working directly affects its microstructural homogeneity and service performance; however, the synergistic roles of different dynamic recrystallization mechanisms and heterogeneous microstructural constituents in microstructural reconstruction remain insufficiently understood. In this study, hot compression tests were conducted to investigate the microstructural evolution of 347H steel at different true strains under deformation conditions of 1200 °C and 10 s⁻¹. Scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM) were further employed to elucidate the underlying dynamic recrystallization mechanisms. The results show that dynamic softening is jointly governed by discontinuous dynamic recrystallization (DDRX) and continuous dynamic recrystallization (CDRX), with a pronounced spatial partitioning of the two mechanisms. With increasing true strain, the microstructure evolves through three successive stages: localized nucleation, mixed-grain development, and microstructural homogenization. At <i>ε</i> = 0.2–0.3, dislocation accumulation and localized DRX nucleation dominate; at <i>ε</i> = 0.5, asynchronous nucleation and grain-boundary migration lead to the development of a mixed-grain structure; and at <i>ε</i> ≥ 0.7, sustained nucleation coupled with grain-boundary migration promotes microstructural homogenization, ultimately producing fine equiaxed recrystallized grains. Local strain concentrations arising from deformation incompatibility around residual <i>δ</i>/<i>γ</i> phase boundaries and coarse MX particles provide preferential sites for DRX nucleation. In contrast, fine second-phase particles dispersed within the matrix suppress grain-boundary migration through Zener pinning, thereby retarding grain growth and stabilizing the fine-grained structure at high strains.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"61 43","pages":"34256 - 34272"},"PeriodicalIF":4.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review: fabrication and applications of magnetic fibers","authors":"Siying Liu,&nbsp;Boyan Li,&nbsp;Yantao Gao","doi":"10.1007/s10853-026-13270-1","DOIUrl":"10.1007/s10853-026-13270-1","url":null,"abstract":"<div><p>As a functional fiber, magnetic fiber integrates magnetic response characteristics with light weight, flexibility and wearability of fiber materials and has become a research hotspot in the fields of textiles, biomedicine, environmental governance and intelligent materials. This paper systematically reviews the main fabrication methods of magnetic fibers, including metal fiber preparation, organometallic complex decomposition, spinning (melt spinning, electrospinning), physical finishing and chemical finishing, and analyzes the advantages and limitations of different methods. Meanwhile, it summarizes the regulation strategies of magnetic fibers in terms of magnetic properties, mechanical properties, thermal stability and biocompatibility and elaborates on their application status in biomedicine (drug targeting, tumor diagnosis and treatment, tissue engineering), environmental governance (sewage purification), intelligent materials (sensors, actuators) and textile and apparel (magnetotherapeutic textiles, self-powered textiles). Finally, aiming at the existing problems in the current research on magnetic fibers, such as uneven dispersion of magnetic particles, difficulty in synergistic regulation of properties, and immature large-scale preparation technology, the future development directions are proposed, including developing novel surface modification technologies, optimizing composite structures, promoting the research and development of large-scale preparation equipment and expanding multifunctional integrated applications.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"61 43","pages":"33371 - 33397"},"PeriodicalIF":4.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiphase Co/CoxB composite electrodes produced via sustainable molten salt electrolysis: structural and electrochemical performance evaluation","authors":"Mehtap Arslan-Kaba,&nbsp;Guldem Kartal Sireli","doi":"10.1007/s10853-026-13806-5","DOIUrl":"10.1007/s10853-026-13806-5","url":null,"abstract":"<div><p>In this study, cobalt/cobalt boride (Co/Co_xB) composite powders were synthesized via environmentally friendly, fast and economical molten salt electrolysis process containing oxide-based electrolytes of Na₂B₄O₇ and Co(OH)₂. Co-deposition of Co and B was achieved on the low-carbon steel substrate at 900 °C for 1 h at the current densities of 200 and 600 mA/cm². The growth mechanism of composite structure, compositional and morphological examinations was analyzed via X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). At 200 mA/cm², powders composed of metallic Co and Co₃B, while at higher current density (600 mA/cm²), multiphase borides were detected as CoB, Co₂B and Co₃B with residual metallic Co. Brunauer–Emmett–Teller (BET) analysis confirmed that Co/Co_<i>x</i>B powders possessed an accessible surface area facilitating electrode/electrolyte interaction. Electrochemical properties were determined via cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) to evaluate the potential of the electrodes for supercapacitor applications. The boride-rich electrode displayed remarkable performance yielded an areal capacitance of 4180 mF/cm², an energy density and power density of 78 mWh/cm² and 2.8 W/cm², compared to Co₃B/Co electrode which showed 2900 mF/cm², 48 mWh/cm² and 2.3 W/cm². Trasatti approach revealed that both electrodes have mixed capacitive-diffusive charge storage mechanism. Post-cycling X-ray photoelectron spectroscopy (XPS) demonstrated the presence of Co-B bonding and Co(OH)₂ species on the electrode surface. These outcomes support the multiphase boron-rich Co/Co_<i>x</i>B that highly enhances the electrochemical performance, highlighting the potential of produced composite-structured electrode as high-performance supercapacitor electrodes.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"61 43","pages":"33858 - 33877"},"PeriodicalIF":4.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasound-driven rapid synthesis of Ni–Ga intermetallic surfaces modulated by electrolytic surface texturing under mild conditions","authors":"Xu Bi,&nbsp;Xiaotong Guo,&nbsp;Xin Xu,&nbsp;Wencheng Song,&nbsp;Shanyu Yao,&nbsp;Xu Yang,&nbsp;Shijie Jia,&nbsp;Dandan Shi,&nbsp;Yan Huo,&nbsp;Junfeng Zhao,&nbsp;Han Dai","doi":"10.1007/s10853-026-13838-x","DOIUrl":"10.1007/s10853-026-13838-x","url":null,"abstract":"<div><p>Ni–Ga intermetallic compounds are catalytically important but typically require high-temperature synthesis. Here, we report a rapid, mild-condition (40 °C) approach combining electrolytic surface texturing of Ni with low-power ultrasound in liquid Ga. The entire process, from texturing to alloying, can be completed within 15 min. Tuning Ni roughness via H₂ bubble etching (0–5 min) controls Ga wettability and ultrasound cavitation nucleation, thereby modulating cavitation efficiency to achieve controllable, ultrasound-driven rapid Ni–Ga intermetallic synthesis. Cross-sectional analysis shows the intermetallic layer thickens with roughness up to 2  min etching (reaching 8.2  μm), then fragments at 5 min due to cavitation induced exfoliation. The optimized Ni–Ga surface (2 min) exhibits significantly enhanced hydrogen evolution reaction activity in 1 M NaOH (Tafel slope 70.6 vs. 116.7 mV dec⁻¹ for pristine Ni) with good stability. Thus, surface roughness offers a rapid and simple way to control Ni–Ga intermetallic synthesis and electrocatalytic performance.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"61 44","pages":"35157 - 35167"},"PeriodicalIF":4.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149162963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-substitution-induced changes in microstructure and electromagnetic properties of YIG ferrites","authors":"Xiaoyi Wang,&nbsp;Kun Xu,&nbsp;Gang Zhou,&nbsp;Xiujuan Feng,&nbsp;Ning Ma,&nbsp;Liuyun Zhang,&nbsp;Gang Chen,&nbsp;Lei Zhao","doi":"10.1007/s10853-026-13801-w","DOIUrl":"10.1007/s10853-026-13801-w","url":null,"abstract":"<div><p>In this paper, Ce-In co-substituted YIG ferrite materials composed of Ca_0.4Y_2.6-<i>x</i>Ce_<i>x</i>Sn_0.4Fe_4.6-<i>x</i>In_<i>x</i>O₁₂ (<i>x</i> = 0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5) were synthesized by a conventional solid-state route. The crystal structure, microstructural, dielectric, and magnetic properties of the samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), impedance analyzer, vibrating sample magnetometer (VSM), and ferromagnetic resonance (FMR). The results demonstrated that Ce-In co-substitution would not affect the synthesis of intact phase of YIG. In addition, an appropriate amount Ce-In substitution could increase the bulk density from 4.793 g/cm³ (<i>x</i> = 0) to 5.133 g/cm³ (<i>x</i> = 0.5), improve the dielectric constant (<i>ε′</i> = 18.9 @100 MHz at <i>x</i> = 0.5), and reduce the ferromagnetic resonance linewidth (<i>ΔH =</i> 337.88 Oe at <i>x</i> = 0.4), but result in the decrease of saturation magnetization (<i>M</i>_<i>S</i> = 23.6 emu/g at <i>x</i> =0.4).</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"61 43","pages":"33779 - 33793"},"PeriodicalIF":4.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optoelectronic and gas sensing properties of sulfur-containing calixarene thin films: selective detection of chloroform vapor","authors":"Dina Hajjar,&nbsp;Arwa A. Makki,&nbsp;Omran A. Omran,&nbsp;Moumen S. Kamel,&nbsp;Mahmoud Mohery","doi":"10.1007/s10853-026-13797-3","DOIUrl":"10.1007/s10853-026-13797-3","url":null,"abstract":"<div><p>Here, we report the use of sulfur-containing calixarene analogs as organic semiconducting thin films for optical and gas sensing. UV–Vis–NIR spectroscopy (300–2500 nm) showed high absorption in the UV region and transparency in the visible region (&gt; 90%). The optical band gap values (determined using Tauc plots) ranged between 3.29 and 3.53 eV, indicating the semiconducting behavior of the compounds. The minimum band gap was observed for compound <b>3b</b> (3.29 eV), suggesting better conjugation. Sensing measurements toward chloroform gas vapor revealed promising responses for all the samples, with compound <b>3b</b> exhibiting the best response with a maximum response value of ~0.83, and fast response/recovery times of 3 s and 6 s, respectively. The sensor showed high selectivity toward chloroform (~83) over other gases. The response was also linearly dependent on the concentration (50–200 ppm, <i>R</i>²= 0.998). The sensor also showed good stability, with a response of 0.836 after 30 days. These results demonstrate the promising potential of sulfur-containing calixarene films as selective VOC sensors.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"61 43","pages":"33626 - 33649"},"PeriodicalIF":4.4,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal stability and high-temperature oxidation behavior of coherent precipitation-strengthened Cu-based multi-component alloys","authors":"Yuan Li,&nbsp;Haibo Shi,&nbsp;Zhumin Li,&nbsp;Shuyuan Xue,&nbsp;Yuanpei Duan,&nbsp;Ling Li,&nbsp;Yuehong Zheng,&nbsp;Jiansheng Li,&nbsp;Wei Jiang,&nbsp;Ao Meng","doi":"10.1007/s10853-026-13728-2","DOIUrl":"10.1007/s10853-026-13728-2","url":null,"abstract":"<div><p>To address the current gap in systematic understanding of microstructural stability and high-temperature oxidation resistance in the novel L1₂ phase precipitation-strengthened Cu-based multi-principal-element alloy, in this study, the evolution of precipitated phases, coarsening kinetics during long-term thermal exposure, and high-temperature oxidation mechanisms were investigated by using multi-scale characterization techniques in combination with first-principles calculations and thermodynamic calculations. The results demonstrate that the multi-component L1₂ phase in the alloy exhibits excellent thermal stability between 650 °C and 750 °C, with a slow coarsening process. In contrast, grain boundary precipitates still experience discontinuous coarsening during prolonged thermal exposure, which may have an adverse effect on the stability of microstructure and properties. Thus, further optimization and precise regulation of the alloy system remain imperative for future research. During oxidation at 850 ~ 990 °C, the oxidation kinetics of the alloy generally conform to a parabolic law, indicating robust and sustained oxidation resistance. A multi-layered oxide film structure forms on the alloy surface, consisting of Al₂O₃, a spinel phase, and outer complex oxides. Notably, the continuous Al-rich oxide layer and multi-component spinel layer synergistically inhibit the diffusion of oxygen and metal ions, thereby significantly enhancing oxidation resistance. Thus, the improved high-temperature performance results from precipitation of stable multi-component L1₂ phase and protective multi-component oxide formation through selective oxidation of Al and Cr.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"61 43","pages":"34027 - 34048"},"PeriodicalIF":4.4,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retention of I-phase during spark plasma sintering of aluminum-quasicrystal nano-composites","authors":"B. Yavas,&nbsp;A. Jenabi,&nbsp;S. Rommel,&nbsp;C. L. Benson,&nbsp;M. Aindow,&nbsp;A. D. Dupuy","doi":"10.1007/s10853-026-13812-7","DOIUrl":"10.1007/s10853-026-13812-7","url":null,"abstract":"<div><p>Aluminum-quasicrystal composites exhibit remarkable combinations of mechanical properties including high specific strength, good ductility and excellent wear resistance. These materials are usually produced in finely divided form to achieve the cooling rates necessary for quasicrystal formation, but subsequent consolidation without decomposing the metastable quasicrystals is particularly challenging. Spark plasma sintering (SPS) is an attractive option for processing such materials because the low temperatures, rapid heating rates, and short cycle times inhibit the kinetics of the transformation processes that lead to loss of metastable phases and microstructures. However, there have not yet been any reports on SPS processing of aluminum-quasicrystal composites to full density while inhibiting the decomposition completely. In this study SPS has been used to consolidate gas-atomized powders of an Al–Cr–Co–Mn–Zr alloy. The powders exhibit a nanocomposite structure comprising icosahedral quasicrystals in an aluminum matrix. Samples SPS-processed under a 100 MPa pressure at 350–600 °C exhibited a transition from a porous untransformed microstructure to a fully dense microstructure in which the quasicrystals had decomposed to form coarse equilibrium Al₄₅(Cr, Mn)₇ and Al₉Co₂ phases. The onset temperature for the decomposition (400 °C) was identified by using X-ray diffraction and electron microscopy. Subsequent SPS trials at 375 °C using higher pressures gave fully dense material with complete retention of the quasicrystalline phase, and this sample had the highest hardness of any of the samples studied (164.8 ± 3.8 HV). The microstructures and hardness values obtained are related to the mechanisms operating during the SPS processing.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"61 44","pages":"34897 - 34914"},"PeriodicalIF":4.4,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}