{"title":"A new viewpoint on the influence mechanism of TaC additions on performance of WC-Co cemented carbides","authors":"I. Konyashin , B. Ries , T. Gestrich","doi":"10.1016/j.ijrmhm.2024.106928","DOIUrl":"10.1016/j.ijrmhm.2024.106928","url":null,"abstract":"<div><div>One of the possible ways to improve performance properties of WC-Co cemented carbides for different applications is known to be adding insignificant amounts of tantalum carbide. Performance of mining tools is noticeably improved as a result of small additions of TaC, so that some companies produce WC-TaC-Co grades for mining applications. Despite clear experimental evidence of the positive influence of small TaC additions on the properties and performance of WC-Co cemented carbides, the mechanism of this influence is presently not understood. In the present work a new viewpoint of the influence mechanism of small TaC additions of performance of WC-Co cemented carbides was elaborated. It was established that small amounts of TaC added to WC-Co cemented carbides form an oversaturated solid solution of tantalum in cobalt when solidifying the liquid binder during cooling from sintering temperatures. This solid solution decomposes when further cooling in the solid state resulting in the formation of (Ta,W)C nanoplatelets and rounded nanoparticles embedded in the binder matrix. The effectiveness of cemented carbide with such a nanograin reinforced binder is assumed to be similar to that of the well-known cemented carbides with the binder reinforced by hard metastable W-Co-C nanoparticles implemented in industry about 20 years ago. The production of the cemented carbides with the (Ta,W)C nanograin reinforce binder is more economical and consistent, which ensures the more sustainable manufacture, and the nanoprecipitates are stable at elevated temperatures.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106928"},"PeriodicalIF":4.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554957","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}
Xianlei Hu , Huan Hu , Ruimin Lai , Qincheng Xie , Ying Zhi
{"title":"Cyclic warm rolling: A path to superior properties in MoCu composites","authors":"Xianlei Hu , Huan Hu , Ruimin Lai , Qincheng Xie , Ying Zhi","doi":"10.1016/j.ijrmhm.2024.106926","DOIUrl":"10.1016/j.ijrmhm.2024.106926","url":null,"abstract":"<div><div>Molybdenum–copper (Mo<img>Cu) composites have a low coefficient of thermal expansion, good electrical and thermal conductivity and mechanical properties, and are widely used in microelectronic packaging heat dissipation materials, aerospace and other fields. Due to the large difference in the properties of Mo and Cu, the deformation of MoCu composites is difficult. At present, there is a lack of research on the deformation process and property changes of MoCu composites with large deformation. In this study, 74 % MoCu30 composites with large deformation are prepared by cyclic warm rolling, and the deformed materials have excellent mechanical and physical properties, and the evolution of the microstructure of the composites during the deformation process is described.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106926"},"PeriodicalIF":4.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532900","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}
Cheng Chen , Qingfang Yun , Changhua Chen , Xingwei Xu , Jianfeng Zhao , Qingxian Li , Wei Wang , Tijun Li , Zhixing Guo , Ji Xiong , Junbo Liu
{"title":"Substrate modification for high performance CrAl/CrAlBN multilayers coated TiCN-based cermet through plasma nitriding","authors":"Cheng Chen , Qingfang Yun , Changhua Chen , Xingwei Xu , Jianfeng Zhao , Qingxian Li , Wei Wang , Tijun Li , Zhixing Guo , Ji Xiong , Junbo Liu","doi":"10.1016/j.ijrmhm.2024.106930","DOIUrl":"10.1016/j.ijrmhm.2024.106930","url":null,"abstract":"<div><div>The plasma nitriding process was conducted on a TiCN-based cermet that had been coated with a multilayer CrAl/CrAlBN coating deposited via cathodic arc. The intensity of the plasma nitriding was modified by adjusting the anode current of the ionization source. To investigate the interface conditions, techniques such as electron probe X-ray microanalysis, electron backscatter diffraction, and transmission electron microscopy were employed. The results indicated that increasing the anode current led to the formation of a thicker nitrided layer and an increase in the texture coefficient of the (111) plane. Specifically, at an anode current of 200 A, the lattice mismatch degree at the TiCN/CrAlN interface decreased from 16.4 % to 3.7 %, resulting in the formation of a nearly coherent interface. The hardness, adhesion strength, and H/E ratio of the coating reached their peak values, and the coated cutting tool exhibited optimal cutting performance when machining the GH4149 superalloy.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106930"},"PeriodicalIF":4.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656063","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":"Predicting potential hard materials in NbB ternary boride: First-principles calculations","authors":"Qinzhi Huang, Qingrui Lin, Yang Xu, Yong Cao","doi":"10.1016/j.ijrmhm.2024.106927","DOIUrl":"10.1016/j.ijrmhm.2024.106927","url":null,"abstract":"<div><div>To identify potential superhard materials, we conducted a comprehensive theoretical investigation of the thermodynamic and kinetic stability, mechanical properties, electronic structure, Debye temperatures and melting point of sixteen ternary transition metal borides NbTMB<sub>x</sub> (x = 1, 2, 4 and TM = Ti, V, Fe, Co, Ni, Zr, Ru, Hf, W, Os) using first-principles methods. Our findings indicate that, with the exception of NbFeB, NbRuB, and NbWB, all other borides exhibit both thermodynamic and kinetic stability. Notably, NbTiB<sub>4</sub>, NbVB<sub>4</sub>, NbZrB<sub>4</sub> and NbHfB<sub>4</sub> demonstrate superior hardness and enhanced resistance to deformation, with NbTiB<sub>4</sub> showing an impressive hardness value of 40.84 GPa, positioning it as a promising candidate for superhard materials. Both NbVB<sub>4</sub> and NbTiB<sub>4</sub> have very high Debye temperatures and melting points and can be used in high temperature environments. We further explored the mechanical properties of NbTiB<sub>4</sub> at elevated temperatures by employing a combination of first-principles and quasi-static methods. Our analysis reveals that the elastic constants and moduli of NbTiB<sub>4</sub> decrease with increasing temperature. Additionally, bonding analysis indicates that all Nb<img>B ternary borides exhibit hybridization involving metallic, ionic, and covalent interactions, resulting in the formation of exceptionally strong covalent bonds between boron atoms.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106927"},"PeriodicalIF":4.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532901","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":"Effect of heat treatment on wear resistance of cold-sprayed Ti-diamond composite coating","authors":"Wenquan Li, Hongxia Zhou, Chenghong Wang","doi":"10.1016/j.ijrmhm.2024.106924","DOIUrl":"10.1016/j.ijrmhm.2024.106924","url":null,"abstract":"<div><div>In order to enhance the wear resistance of cold-sprayed Ti coatings, Ti-diamond (Ti-MD) composite coatings were fabricated, followed by heat treatment at different temperatures. The effects of heat treatment temperature on the wear resistance of the composite coatings were assessed using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), microhardness testing, and wear resistance experiments. The results show that the composite coating undergo no phase transformation after heat treatment, and exhibits higher microhardness and improved wear resistance. The porosity results showed that the porosity of the coating decreased as the heat treatment temperature increases. TEM results showed that stable TiC (about 10 nm) was formed at the interface between the titanium and diamond particles after heat treatment at 800 °C, and nanoindentation results showed that the heat-treated coating had higher deformation resistance. Specifically, when the heat-treated temperature rose to 800 °C, the composite coating exhibits an 80 % reduction in wear rate, primarily attributable to the decreased porosity of the coating and the enhanced adhesion between Ti and diamond particles. The wear mechanisms of the heat-treated coatings are predominantly reduced oxidative and abrasive wear.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106924"},"PeriodicalIF":4.2,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554955","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}
Chaoping Jiang, Ruoyi Zhao, Lei Shi, Fengying Zhang
{"title":"Effect of W content on microstructure and corrosion-wear properties of WNi coatings by laser cladding","authors":"Chaoping Jiang, Ruoyi Zhao, Lei Shi, Fengying Zhang","doi":"10.1016/j.ijrmhm.2024.106925","DOIUrl":"10.1016/j.ijrmhm.2024.106925","url":null,"abstract":"<div><div>xW-Ni (x = 60, 70, 80, 90 wt%) coatings were prepared by laser cladding on the surface of X80 steel substrate to explore the effects of different W contents on the microstructure, corrosion resistance, microhardness and corrosion-wear properties of the W<img>Ni coatings. The results revealed that the microstructure of the various W<img>Ni coatings composed of W and γ (Ni, Fe) phases. The increase in W content resulted in more W atoms being dissolved in the γ (Ni, Fe) phase, enhancing the solid solution strengthening effect, which increased the average microhardness of the coating. Moreover, the addition of W provided diffusion channels for metal ions to migrate to the surface of the coating for passivation film formation, which improved the corrosion resistance of the coating. However, the addition of excessive amounts of W caused the coating density to decrease and accelerated galvanic corrosion. The 80 W-Ni coating among the studied coatings exhibited excellent corrosive-wear resistance due to its high hardness and good corrosion resistance. This coating corrosive-wear mechanism was the combination of abrasive wear and corrosion.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106925"},"PeriodicalIF":4.2,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532902","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":"Melting temperature and elastic constants of disordered nonstoichiometric cubic TiCy, ZrCy and HfCy carbides","authors":"Aleksandr I. Gusev","doi":"10.1016/j.ijrmhm.2024.106920","DOIUrl":"10.1016/j.ijrmhm.2024.106920","url":null,"abstract":"<div><div>Based on the analysis of phase diagrams of carbide-forming systems M–C (M = Ti, Zr, Hf), an empirical relationship is proposed between the elastic stiffness constants <em>c</em><sub><em>ij</em></sub> of nonstoichiometric cubic carbides of titanium, zirconium and hafnium and their melting temperature. The dependences of the melting temperatures of nonstoichiometric cubic carbides TiC<sub><em>y</em></sub>, ZrC<sub><em>y</em></sub> and HfC<sub><em>y</em></sub> on their composition in homogeneity regions are calculated using the elastic stiffness constants <em>c</em><sub>11</sub>(<em>y</em>) and <em>c</em><sub>44</sub>(<em>y</em>) of these carbides. The calculated maximum melting temperatures are observed for carbides ∼TiC<sub>0.80</sub>, ∼ZrC<sub>0.82</sub> and ∼ HfC<sub>0.94</sub><sub>–</sub><sub>0.95</sub> and are equal to 3345, 3708 and 4192 K, respectively. There is a qualitative correlation between the concentration dependences of the melting temperatures <em>T</em><sub>m</sub>(<em>y</em>) of TiC<sub><em>y</em></sub>, ZrC<sub><em>y</em></sub> and HfC<sub><em>y</em></sub> carbides and the anisotropy of the elastic properties of these carbides.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106920"},"PeriodicalIF":4.2,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532393","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":"Next-generation tungsten carbide cutting bits through cryogenic treatment technique for superior rock cutting performance for mining applications: An experimental study","authors":"Mogana Priya Chinnasamy , Biswajit Samanta , Rahul Kumar , Rajasekar Rathanasamy","doi":"10.1016/j.ijrmhm.2024.106923","DOIUrl":"10.1016/j.ijrmhm.2024.106923","url":null,"abstract":"<div><div>The mining sector seeks innovation to enhance operational efficiency and prolong cutting tool life. This research investigates the impact of cryogenic treatment (CT) for 12, 24, and 36 h on tungsten carbide cutting bits used in mine machineries, focusing on its effects on cutting force, energy consumption, and tool wear during lab-scale linear rock cutting. Microstructural analysis and hardness testing follow CT, revealing improvements in hardness, the formation of new compounds, and the presence of eta carbides. Analysis of linear rock cutting experiments shows that longer holding periods under CT lead to reduced cutting force, energy consumption, and tool wear. Comparing CT 24 to untreated bit at a cutting speed of 200 m/s, CT 24 demonstrates reduction in specific energy by 39.35 %, 41.13 %, and 29.39 % at depth of cut (DoC) of 2 mm, 4 mm, and 6 mm, respectively. Additionally, CT 24 exhibits significantly lower wear rates (79.24 %, 85.44 %, and 85.01 %) compared to UT bits at the same cutting speed. Microstructural analysis identifies multiple wear mechanisms in both treated and untreated worn tools. To optimize the cutting process for mining efficiency, grey relational analysis and Python-based non-dominant sorting are employed. Grey relational analysis identifies 24-h CT, a cutting speed of 200 m/s, and a 2 mm depth of cut as optimal. Non-dominant sorting suggests 24-h CT, a cutting speed of 200 m/s, and 2–4 mm cut depth for optimal results. Pareto solutions indicate specific energy ranging from 14.96 to 9.20 kWh/m<sup>3</sup> and wear rates ranging from 0.33 to 0.39 × 10<sup>−4</sup> cm<sup>3</sup>/cm. Insights from this study offer valuable guidance for the mining industry to enhance cutting tool efficiency and promote environmentally sustainable mining practices.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106923"},"PeriodicalIF":4.2,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527914","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}
Yang Gao , Xiaoting Li , Bo-Yu Li , Sheng-Qiang Deng , De-Jian Sun , Xiao-qin Guo , Lei Fan , Linan An
{"title":"Effect of oscillation frequency on microstructure and properties of WC-Co cemented carbide prepared by hot oscillating pressing","authors":"Yang Gao , Xiaoting Li , Bo-Yu Li , Sheng-Qiang Deng , De-Jian Sun , Xiao-qin Guo , Lei Fan , Linan An","doi":"10.1016/j.ijrmhm.2024.106922","DOIUrl":"10.1016/j.ijrmhm.2024.106922","url":null,"abstract":"<div><div>In this study, a novel hot oscillating pressing (HOP) was used to prepared WC-Co cemented carbides under various oscillation frequencies. The effects of sintering frequencies on the density, microstructure, and mechanical properties of cemented carbides were systematically investigated. The results show that applying a specific oscillation frequency during the sintering process can greatly aid in the densification process, improve the uniformity of microstructure, help the grain refinement, and prevent the formation of abnormally large WC grains. The mechanical properties of the alloys showed a noticeable improvement as the oscillation frequency increased. The hardness and fracture toughness of cemented carbides were not significantly improved when the oscillation frequency was ≥5 Hz, with the optimal values reaching 1913 kg/m<sup>2</sup> and 13.11 MPa.m<sup>1/2</sup>, in turn. The improvement in mechanical properties of cemented carbide can be mainly attributed to higher density, grain refinement, microstructure uniformity and the increase of dislocation/twins caused by plastic deformation.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"125 ","pages":"Article 106922"},"PeriodicalIF":4.2,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142442207","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}
L. Ortiz-Membrado , R. Benítez , L. Llanes , E. Jiménez-Piqué
{"title":"High-speed Nanoindentation Data Analysis of WC-based Cemented Carbides using Gaussian Mixture Model Clustering and Skew-normal Mixture: Beyond Gaussian Deconvolution","authors":"L. Ortiz-Membrado , R. Benítez , L. Llanes , E. Jiménez-Piqué","doi":"10.1016/j.ijrmhm.2024.106917","DOIUrl":"10.1016/j.ijrmhm.2024.106917","url":null,"abstract":"<div><div>The mapping of micromechanical properties of heterogeneous materials with high-speed nanoindentation faces challenges in data interpretation and extraction of reliable phase properties. Gaussian deconvolution has commonly been used to treat this data, but problems arise when microstructures are fine compared to the indentation imprint size and the mechanical properties of the different phases are not extremely different. Recently machine-learning methods, such as clustering techniques, have emerged as good approaches to assess these challenges.</div><div>Within this context, it is important to understand the micromechanical properties of cemented carbides, materials usually referred to as hardmetals, but their complex microstructure poses challenges for assessment and interpretation. The study reveals insights from high-speed nanoindentation data treatment on hardmetals with different microstructures and binder compostion. The data has been statistically analyzed by means of a clustering method: Gaussian Mixture Model (GMM) and the fitting of a mixture of skew-normal distributions. Findings underscore the asymmetry in phase properties, and the challenges GMM encounters in some samples. The skew-normal method offers enhanced precision and addresses issues related to scatter in phase intersections, providing a more accurate representation of fine microstructural features. The combined approach of GMM and skew-normal proves consistent for reliable evaluation of micromechanical properties from nanoindentation maps in cemented carbides, and demonstrate the potential of this technique to be applied to novel hardmetal compositions as well as other composites.</div></div>","PeriodicalId":14216,"journal":{"name":"International Journal of Refractory Metals & Hard Materials","volume":"126 ","pages":"Article 106917"},"PeriodicalIF":4.2,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142532903","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}