International Journal of Refractory Metals & Hard Materials最新文献

{"title":"Enhancing coatings mechanical performance by advanced laser deposition of WCCoCr-colmonoy composites","authors":"V. Errico,&nbsp;P. Posa,&nbsp;A. Angelastro,&nbsp;S.L. Campanelli","doi":"10.1016/j.ijrmhm.2024.106898","DOIUrl":"10.1016/j.ijrmhm.2024.106898","url":null,"abstract":"<div><div>The manufacturing industry's focus on achieving surfaces with advanced mechanical performance is driven by objectives of competitiveness, sustainability, and efficiency. This study explores the use of Directed Energy Deposition-Laser Beam (DED-LB) process to create Metal Matrix Composites (MMCs) coatings with high mechanical properties, consisting of a nickel-based alloy (Colmonoy 227-F) reinforced with WC-Co-Cr particles, deposited on a 316 L steel substrate. The specific aims of this research are to optimize the DED-LB process parameters and investigate the effect of different reinforcement percentages on the mechanical properties of MMC coatings. The objectives include evaluating the microstructural integrity, hardness, and material distribution of coatings with varying WC-Co-Cr reinforcement levels. The DED-LB technique offers advantages such as localized heat input, rapid cooling rates for finer microstructures, and controlled bonding between substrate and coating. Particularly, it allows for the creation of MMCs, including ceramic-reinforced ones, known for their enhanced mechanical properties. However, managing the dissolution of ceramic reinforcement within the metal matrix remains a challenge.</div><div>In this research, two reinforcement percentages (10 % and 40 % WC-Co-Cr) were investigated to optimize the process parameters and enhance mechanical properties. Microstructural analysis showed that coatings with 10 % reinforcement maintained a spherical morphology, while 40 % exhibited a slight dispersion of individual carbide grains within the matrix. Vickers hardness tests indicated hardness values of 375 ± 15 HV for 10 % and 490 ± 10 HV for 40 %, with the pure matrix hardness measured at 325 ± 10 HV. This demonstrates the reinforcement effect in both composite coatings. Chemical composition analysis confirmed proper distribution of elements.</div><div>The study demonstrates that MMC coatings produced through laser deposition with optimized parameters exhibit favorable microstructures, increased hardness, and correct material distribution. The scientific novelty of this work lies in demonstrating that a high level of reinforcement (40 %) can be incorporated without metallurgical defects, enhancing the mechanical properties significantly beyond typical reinforcement levels. These findings are essential for improving mechanical performance and wear resistance in high abrasive load applications. The research contributes valuable insights into optimizing DED-LB processes for advanced MMC coatings, crucial for sustainable and efficient manufacturing practices.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106898"},"PeriodicalIF":4.2,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0263436824003469/pdfft?md5=309e50d6d35a18a150802f902db37dff&pid=1-s2.0-S0263436824003469-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142306454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-situ crack propagation dynamics in multicomponent ultra-high temperature carbides","authors":"Ambreen Nisar ,&nbsp;Sohail M.A.K. Mohammed ,&nbsp;Gia Garino ,&nbsp;Udit Kumar ,&nbsp;Denny John ,&nbsp;Brandon A. Aguiar ,&nbsp;Sudipta Seal ,&nbsp;Arvind Agarwal","doi":"10.1016/j.ijrmhm.2024.106897","DOIUrl":"10.1016/j.ijrmhm.2024.106897","url":null,"abstract":"<div><p>Solid-solutioning in multicomponent ultra-high temperature ceramics (MC-UHTCs) has been shown to improve their thermo-mechanical properties unattainable by conventional UHTCs. Herein, MC-UHTCs are synthesized by varying the components from binary up to quaternary in (Ta,Nb,Hf,Ti)C system using spark plasma sintering (SPS). The present work identifies real-time quantitative failure events such as cracking, crack propagation and fracture using a high-speed camera during 4-point flexural testing in MC-UHTCs. Quaternary UHTCs showed the highest flexural strength of 726 MPa, representing an improvement of ∼166 % over binary and ∼ 24 % over ternary UHTCs. This has been attributed to processing-induced solid solutions and sub-micron feature defects, such as dislocations, intergrain twisting, and plasticity, revealed from the high-resolution microscopy. Crack-propagation rate significantly depreciated over 37 times in quaternary UHTC. An improvement in crack shielding is observed in quaternary UHTC, showcasing the highest fracture toughness at 4.7 MPa·m^0.5, surpassing binary and ternary UHTCs by ∼270 % and ∼ 166 %, respectively. The lower mechanical properties in binary UHTCs are also attributed to high porosity. Post-fracture microstructural analysis supports this finding due to the presence of river patterns contrived by crack-arrest at grain boundary or crack re-initiation in different orientations. The study reveals the exceptional damage tolerance of quaternary UHTCs over other compositions, making them a potential structural material for hypersonic applications.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106897"},"PeriodicalIF":4.2,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142274426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 influence of low degree of deformation on the corrosion resistance of pure tantalum in corrosive media","authors":"Junjun Yuan,&nbsp;Yingjun Wang,&nbsp;Xiao Hou,&nbsp;Jianhui Zhong,&nbsp;Dunqiang Tan","doi":"10.1016/j.ijrmhm.2024.106899","DOIUrl":"10.1016/j.ijrmhm.2024.106899","url":null,"abstract":"<div><p>This study investigates the influence of minor deformation on the corrosion resistance of pure tantalum in strongly acidic and alkaline solutions. The electrochemical behavior of samples with varying degrees of deformation was characterized through open circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy. The results indicate that in acidic solutions, the corrosion current density and EIS results suggest that low degree deformation reduces the corrosion resistance of tantalum viewed from a kinetic perspective. Conversely, in alkaline solutions, the corrosion potential shifts towards more positive values, but the corrosion current density remains relatively stable, and the electrochemical impedance increases, indicating enhanced corrosion resistance in minor deformed tantalum samples. Analysis reveals that in acidic solutions, the corrosion resistance is primarily affected by the density of geometrically necessary dislocations and the degree of strain, whereas in alkaline solutions, the crystal orientation and grain boundaries are the predominant factors influencing the corrosion resistance.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106899"},"PeriodicalIF":4.2,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142274338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced an eutectic carbide reinforced niobium alloy by optimizing Mo and W alloying elements","authors":"Qiang Shen ,&nbsp;Xinting Wu ,&nbsp;Xiaohong Chen ,&nbsp;Qinqin Wei ,&nbsp;Jian Zhang ,&nbsp;Guoqiang Luo","doi":"10.1016/j.ijrmhm.2024.106893","DOIUrl":"10.1016/j.ijrmhm.2024.106893","url":null,"abstract":"<div><div>Niobium alloys play an indispensable role in aerospace technology. However, traditional niobium alloys has unsatisfactory or high-temperature strength or limited room-temperature. This work introduces Nb₂Mo_xW_yC_0.25 alloys with strength-plasticity balance by optimizing refractory alloy elements and eutectic carbides drawing on the design concepts of eutectic high-entropy alloys. The influence of Mo and W contents on the microstructure and mechanical properties of the alloys was studied. The Nb₂Mo_xW_yC_0.25 alloy contain body-centered cubic (BCC) primary phase and eutectic structures composed of BCC and carbide phases with semi-coherent interfaces. Appropriate additions of Mo and W refine the grain size of the primary BCC phase and cause the carbide phase to evolve from Nb₂C to NbC. The Nb₂Mo_0.5W_0.5C_0.25 hypoeutectic niobium alloy composed of BCC and Nb₂C phases with a relatively small lattice mismatch has a room-temperature yield strength of 1.27 ± 0.04 GPa, compressive strength of 2.03 ± 0.06 GPa, and a fracture strain of 17.8 ± 2.2 %. Solid solution strengthening in the BCC phase and second-phase strengthening of the carbide phase simultaneously enhance the alloy. The fine grain strengthening, reduced crack origination at low mismatch interface, and the crack tip by soft BCC at the phase interface improve the plasticity simultaneously. This paper provides a method to improve the room-temperature plasticity and strength of refractory niobium alloys, laying the foundation for the industrial application of refractory niobium alloys.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106893"},"PeriodicalIF":4.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 Taylor-Quinney coefficient of tungsten-base heavy alloys","authors":"G.G. Goviazin ,&nbsp;V. Tannieres ,&nbsp;R. Cury ,&nbsp;D. Rittel","doi":"10.1016/j.ijrmhm.2024.106896","DOIUrl":"10.1016/j.ijrmhm.2024.106896","url":null,"abstract":"<div><p>Tungsten heavy alloys (WHAs) have been widely investigated due to their high density and strength, thus making them suitable candidates for defense applications, especially those involving high strain rates, such as Kinetic Energy Penetrators (KEP) for armour-piercing fin-stabilized discarding sabot (APFSDS) ammunition. Besides their mechanical properties, the extent of the thermomechanical coupling, i.e., the Taylor-Quinney coefficient (TQC), is relevant for producing accurate numerical models of high strain rate configurations. However, the TQC of WHAs has not been investigated yet.</p><p>Four different WHA prototypes were evaluated. Changing the content of tungsten from 70 to 92.5 wt% had little effect on the TQC which had an average value of 0.24. Those low TQC values are accompanied by a significant strain-rate sensitivity with minimal strain hardening. Throughout the tests, dynamic shear localization was not observed.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106896"},"PeriodicalIF":4.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142274339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of microstructure, mechanical and oxidation properties of WC-Co-Ni-Fe-Al multicomponent hardmetals","authors":"A.L. Deng ,&nbsp;Y.B. Niu ,&nbsp;N. Lin ,&nbsp;Z.G. Wu ,&nbsp;J. Yin ,&nbsp;C. Ma","doi":"10.1016/j.ijrmhm.2024.106894","DOIUrl":"10.1016/j.ijrmhm.2024.106894","url":null,"abstract":"<div><p>In this paper, the influences of Al element originating from AlN additives on the mechanical properties and oxidation behavior of WC-Co-Ni-Fe hardmetals were studied systematically. During the sintering process, Al element diffused into the WC hard grains and led to the formation of (Ni,Co,Fe)₃Al particles in the metal binder phase of hardmetals. A small amount of Al element enhanced the hardness of WC-Co-Ni-Fe hardmetal via the solution strengthening and dispersion strengthening. However, the addition of Al element decreased the fracture toughness of hardmetals. The hardness and fracture toughness of multicomponent hardmetals with the addition of 0.5 wt% AlN were 90.4HRA and 10.6 MPa m^1/2, respectively. Additionally, the introduction of Al also significantly improved the oxidation resistance of hardmetals due to the existence of Al in WO₃ and (Ni,Co,Fe)WO₄. With the addition of 2.0 wt% AlN, the weight gain of WC-Co-Ni-Fe-Al multicomponent hardmetal after 5 h of oxidation at 700 °C was 66.82 % of that of the Al-free hardmetal.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106894"},"PeriodicalIF":4.2,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142274340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Field-assisted sintering of MC-Ti3SiC2 composites with adjustable thermal expansion coefficient","authors":"Leonhard Gertlowski ,&nbsp;Simone Herzog ,&nbsp;Sofia Fries ,&nbsp;Christoph Broeckmann","doi":"10.1016/j.ijrmhm.2024.106892","DOIUrl":"10.1016/j.ijrmhm.2024.106892","url":null,"abstract":"<div><div>Tool materials for precision glass moulding made of WC or SiC bear the risk of glass breakage due to a difference in the coefficient of thermal expansion (CTE) between the mould and the glass. The aim of this study is to develop a MAX phase composite with increased CTE and thus reduced CTE difference. A mixture of Ti₃SiC₂ and 10 vol% SiC powder was sintered between 1250 °C and 1350 °C using the field-assisted sintering technique (FAST). In addition to the sintering temperature, the dwell time and the initial particle size were varied using a full factorial experimental design. Complete densification, homogeneous carbide distribution and no grain coarsening were observed for specimens sintered at 1300 °C for 10 min at 50 MPa. The grain size of SiC and Ti₃SiC₂ is approximately 0.3 μm, although larger grains occasionally occur. Identified process parameters were successfully transferred to TiC reinforced Ti₃SiC₂ composites. While the carbide content can be specifically controlled by mixing, the MAX phase partially decomposes during sintering. MC additions between 10 and 30 vol% resulted in an adjustable CTE in the range 6.8–9.0 ppm/K.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106892"},"PeriodicalIF":4.2,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0263436824003408/pdfft?md5=10ff2a35110b60cc162cbdc0ec9e623e&pid=1-s2.0-S0263436824003408-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Manufacturing of heavy tungsten alloys from nano-sized metal oxides via simultaneous reduction-sintering powder treatments","authors":"K.S. Abdel Halim ,&nbsp;A.A. El-Geassy ,&nbsp;M.I. Nasr ,&nbsp;Mohamed Ramadan ,&nbsp;Naglaa Fathy ,&nbsp;Abdulaziz S. Alghamdi","doi":"10.1016/j.ijrmhm.2024.106891","DOIUrl":"10.1016/j.ijrmhm.2024.106891","url":null,"abstract":"&lt;div&gt;&lt;p&gt;Heavy tungsten alloys are of great importance in the engineering and mining industries as well as the military and medical applications because of their stability at high temperatures, high strength and dense structures. The present study develops a novel technology for the production of heavy tungsten alloys via thermal treatment of nano-sized metal oxides based on simultaneous reduction and sintering processes. Heavy tungsten alloy (95W-3Ni-2Fe) was produced from the reduction of mixed nano-sized metal oxides precursor in H&lt;sub&gt;2&lt;/sub&gt; at 1000 &lt;sup&gt;o&lt;/sup&gt; C followed by sintering at 1350–1450 &lt;sup&gt;o&lt;/sup&gt; C for 30–90 min. The reduced and sintered samples were characterized by XRD to follow up the crystallinity, total porosity measurement was used to find out the densification properties, the grain structure and morphology were examined by RLM and SEM attached with EDAX. Micro-hardness tester was also used to investigate the influence of sintering conditions on the grain densification. A fundamental study on the kinetics of reduction of mixed nano-sized metal oxides precursor was performed by isothermal and non-isothermal techniques. Both results from isothermal and non-isothermal tests were used to calculate the activation energy which was correlated with macro- and micro-structures to predict the corresponding reduction mechanism. However, the influence of sintering temperature and time on the crystallinity of the produced phases, grain structure, morphology, total porosity, pore-size distribution, bulk and apparent densities, and the hardness of sintered compacts was extensively investigated. The results revealed that the presence of NiO and/or Fe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; in the mixed metal oxides precursor was very important to ease the reducibility of WO&lt;sub&gt;3&lt;/sub&gt; as the metallic phases of Ni and/or Fe act as a catalyst for the reduction of WO&lt;sub&gt;3&lt;/sub&gt;. The rate of reduction proceeds faster in the following order: NiO &gt; Fe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; &gt; mixed oxide &gt; WO&lt;sub&gt;3&lt;/sub&gt;. In non-isothermal experiments, it was found that the heating rate has a considerable effect on the reduction of precursor, i.e., the lower the heating rate, the higher the degree of reduction. It might be reported that the use of nano-sized metal oxides particles in the fabrication of heavy tungsten alloys greatly affects the main properties of the produced alloy. With the increase in sintering time, larger sizes of dense grains were developed, and the matrix became denser as a result of sintering and re-crystallization effects. The higher the sintering time, the higher the grain densification and the less pores formed in the matrix. On the other hand, with the increase in the sintering temperature, the grain boundaries were well defined in which the grains were composed of tungsten metal and surrounded by inter-metallics. The higher the temperature, the higher the XRD peak intensities of metallic tungsten and intermetallics as a result of sint","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106891"},"PeriodicalIF":4.2,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142274337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A yield strength prediction framework for refractory high-entropy alloys based on machine learning","authors":"Shujian Ding ,&nbsp;Weili Wang ,&nbsp;Yifan Zhang ,&nbsp;Wei Ren ,&nbsp;Xiang Weng ,&nbsp;Jian Chen","doi":"10.1016/j.ijrmhm.2024.106884","DOIUrl":"10.1016/j.ijrmhm.2024.106884","url":null,"abstract":"<div><div>Machine learning has been widely applied to materials research with the development of artificial intelligence. Here, a new framework mainly based on the LightGBM algorithm was proposed, which predicted the yield strength of refractory high-entropy alloys (RHEAs) in various temperatures. The features of <em>T</em>, <em>D·B</em>, <em>μ</em>, <em>Smix</em>, <em>Gmix</em> and <em>r</em> were recognized as the optimal feature set by several feature screening methods. The framework displayed good prediction results with a coefficient of determination (<em>R</em>^<em>2</em>) of 0.9605 and a root mean square error (<em>RMSE</em>) of 111.99 MPa in the test set. A series of RHEA samples validated the generalization of this framework. SHAP with pearson correlation constant (<em>PCC</em>) and maximal information coefficient (<em>MIC</em>) interpreted the framework and analyzed the intrinsic mechanism of features on yield strength, discovering a novel <em>μ</em>-<em>D·B</em>-<em>Gmix</em> design strategy for obtaining RHEAs with enhanced yield strength. Both TiTaNbHfNi_0.25 and TiTaNbHfNi_0.5 alloys were fabricated as the experimental verification for this framework which showed 1230 and 1311 MPa yield strength with the predicted errors of 6.3 % and 3.7 %. The validations above demonstrated the excellent performance of the present framework and the effectiveness of such a strategy.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106884"},"PeriodicalIF":4.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemical vapor deposited TiCN/TiC multilayer coatings: On the interplay between coating architecture and mechanical properties","authors":"Christina Kainz ,&nbsp;Michael Tkadletz ,&nbsp;Verena Maier-Kiener ,&nbsp;Bernhard Völker ,&nbsp;Michael Burtscher ,&nbsp;Helene Waldl ,&nbsp;Maximilian Schiester ,&nbsp;Josef Thurner ,&nbsp;Christoph Czettl ,&nbsp;Nina Schalk","doi":"10.1016/j.ijrmhm.2024.106890","DOIUrl":"10.1016/j.ijrmhm.2024.106890","url":null,"abstract":"<div><p>Modifying the architecture from a monolithic to a multilayered structure allows adjusting the mechanical properties and cutting performance of industrially relevant hard coatings. The present work focuses on the microstructural, micro-mechanical and cutting performance evaluation of a multilayered TiC_0.67N_0.33/TiC coating grown by chemical vapor deposition. Energy dispersive X-ray spectroscopy and atom probe tomography confirmed the presence of individual TiC and TiC_0.67N_0.33 layers of ∼120 nm thickness with well-defined interfaces. The overall C/(C + N) ratio of the coating amounts to 0.82. Individual peaks for the TiC_0.67N_0.33 and the TiC layer can be observed in the X-ray diffractogram of the TiCN/TiC coating. Scanning electron microscopy showed that the grains grow through the interfaces between the TiCN and TiC layers. Finally, the micro-mechanical properties and cutting performance of the TiCN/TiC multilayer were compared with a monolithic TiCN coating. The fact that the TiCN/TiC coating outperformed the monolithic reference TiCN in regard of hardness and cutting performance emphasizes the high potential of multilayered coatings for use in demanding applications.</p></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106890"},"PeriodicalIF":4.2,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S026343682400338X/pdfft?md5=1b75fdb38d0439d2dfe820884284e0dc&pid=1-s2.0-S026343682400338X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142274424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}