Effects of (ZrHfNbTaTiMo)C addition on microstructure and mechanical properties of WC-10Co cemented carbides

IF 1.6 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Powder Metallurgy Pub Date : 2024-12-16 DOI:10.1177/00325899241306588

Xiao‐Chun Deng, Guo‐Hua Zhang

{"title":"Effects of (ZrHfNbTaTiMo)C addition on microstructure and mechanical properties of WC-10Co cemented carbides","authors":"Xiao‐Chun Deng, Guo‐Hua Zhang","doi":"10.1177/00325899241306588","DOIUrl":null,"url":null,"abstract":"The WC-10Co cemented carbides containing (ZrHfNbTaTiMo)C high-entropy carbide with satisfactory comprehensive mechanical properties were successfully manufactured by conventional vacuum sintering. The influences of (ZrHfNbTaTiMo)C contents (0, 0.5, 1, 5, 10 wt.%) on the densification degree, microstructure, grain size and mechanical properties were investigated. The results showed that the addition of (ZrHfNbTaTiMo)C deteriorated the wettability between Co and WC, leading to a decline in relative density. (ZrHfNbTaTiMo)C inhibited the growth of WC grains, and the average grain size of WC continued to decrease with the increase of (ZrHfNbTaTiMo)C content. After adding (ZrHfNbTaTiMo)C, the hardness and toughness rose first and then descended. When the content of (ZrHfNbTaTiMo)C was 1 wt.%, the hardness and toughness reached the maximum value of 16.77 GPa and 10.45 MPa·m 1/2 , respectively. Moreover, the structure was a dual-grain structure, with many high-aspect-ratio rectangular grains in the sintered samples added by 0.5 wt.% and 1 wt.% (ZrHfNbTaTiMo)C. This special structure not only enhanced the hardness, but also compensated the loss of toughness. After doping 0.5 wt.% CeO 2 , the hardness decreased slightly, while the toughness increased to 12.42%.","PeriodicalId":20392,"journal":{"name":"Powder Metallurgy","volume":"68 1","pages":"41-52"},"PeriodicalIF":1.6000,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Metallurgy","FirstCategoryId":"0","ListUrlMain":"https://doi.org/10.1177/00325899241306588","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}

引用次数: 1

Abstract

The WC-10Co cemented carbides containing (ZrHfNbTaTiMo)C high-entropy carbide with satisfactory comprehensive mechanical properties were successfully manufactured by conventional vacuum sintering. The influences of (ZrHfNbTaTiMo)C contents (0, 0.5, 1, 5, 10 wt.%) on the densification degree, microstructure, grain size and mechanical properties were investigated. The results showed that the addition of (ZrHfNbTaTiMo)C deteriorated the wettability between Co and WC, leading to a decline in relative density. (ZrHfNbTaTiMo)C inhibited the growth of WC grains, and the average grain size of WC continued to decrease with the increase of (ZrHfNbTaTiMo)C content. After adding (ZrHfNbTaTiMo)C, the hardness and toughness rose first and then descended. When the content of (ZrHfNbTaTiMo)C was 1 wt.%, the hardness and toughness reached the maximum value of 16.77 GPa and 10.45 MPa·m 1/2 , respectively. Moreover, the structure was a dual-grain structure, with many high-aspect-ratio rectangular grains in the sintered samples added by 0.5 wt.% and 1 wt.% (ZrHfNbTaTiMo)C. This special structure not only enhanced the hardness, but also compensated the loss of toughness. After doping 0.5 wt.% CeO 2 , the hardness decreased slightly, while the toughness increased to 12.42%.

查看原文本刊更多论文

添加（ZrHfNbTaTiMo）C对WC-10Co硬质合金组织和力学性能的影响

采用常规真空烧结方法成功制备了具有良好综合力学性能的（ZrHfNbTaTiMo）C高熵碳化物WC-10Co硬质合金。研究了（ZrHfNbTaTiMo）C含量（0、0.5、1、5、10 wt.%）对合金致密化程度、显微组织、晶粒尺寸和力学性能的影响。结果表明：（ZrHfNbTaTiMo）C的加入使Co与WC之间的润湿性恶化，导致相对密度下降；（ZrHfNbTaTiMo）C抑制了WC晶粒的生长，WC的平均晶粒尺寸随着（ZrHfNbTaTiMo）C含量的增加而继续减小。加入（ZrHfNbTaTiMo）C后，硬度和韧性先上升后下降。当（ZrHfNbTaTiMo）C含量为1 wt.%时，合金的硬度和韧性分别达到最大值16.77 GPa和10.45 MPa·m 1/2。此外，该组织为双晶结构，在烧结样品中添加0.5 wt.%和1 wt.% (ZrHfNbTaTiMo)C，具有许多高纵横比的矩形晶粒。这种特殊的结构不仅提高了硬度，而且弥补了韧性的损失。添加0.5 wt.%的ceo2后，硬度略有下降，韧性提高到12.42%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Powder Metallurgy 工程技术-冶金工程

CiteScore

2.90

自引率

7.10%

发文量

审稿时长

3 months

期刊介绍： Powder Metallurgy is an international journal publishing peer-reviewed original research on the science and practice of powder metallurgy and particulate technology. Coverage includes metallic particulate materials, PM tool materials, hard materials, composites, and novel powder based materials.