TiC颗粒增强FeCrCoMnNi基复合材料的微观组织与力学性能  

Microstructure and mechanical properties of FeCrCoMnNi matrix composites reinforced by TiC particles

作　　者：欧阳维 翟博 陈文琳[1] 宋奎晶[1] 陈畅[1] 钟志宏[1] OUYANG Wei;ZHAI Bo;CHEN Wenlin;SONG Kuijing;CHEN Chang;ZHONG Zhihong(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《粉末冶金技术》2024年第4期338-345,共8页Powder Metallurgy Technology

摘　　要：采用机械球磨和放电等离子烧结制备了TiC颗粒增强FeCrCoMnNi高熵合金基复合材料,研究了TiC质量分数和烧结温度对复合材料组织性能的影响。结果表明,随着TiC质量分数的增加,复合材料中由C和Cr反应形成的M_(23)C_(6)碳化物的数量也增加,复合材料由面心立方基体、TiC和Cr_(23)C_(6)碳化物组成。1000℃烧结制备的复合材料中,当TiC质量分数在1%~9%时,陶瓷颗粒增强相在复合材料中的分布较为均匀。烧结温度对组织性能有较大影响,1000℃和1050℃烧结制备的复合材料组织均匀,具有较佳的力学性能。添加7%TiC的复合材料硬度和室温屈服强度分别是未添加TiC复合材料的2.5倍和3.0倍,这得益于TiC和Cr_(23)C_(6)碳化物硬质相的强化作用。FeCrCoMnNi matrix composites reinforced by TiC particles were prepared by mechanical ball milling and spark plasma sintering.Effects of TiC mass fraction and sintering temperature on the microstructure and mechanical properties of the composites were evaluated.The results show that,the composites are composed of the face-centered cubic matrix,TiC,and Cr_(23)C_(6) carbide reinforcements,and the content of Cr_(23)C_(6) formed by the reaction between Cr and C increases with the increase of TiC content.The reinforcements distribute relatively uniform in the composites fabricated at 1000℃,when the TiC mass fraction is 1%~9%.The sintering temperature has a significant effect on the microstructure and mechanical properties.The samples sintered at 1000℃or 1050℃have the relatively uniform microstructure and exhibit the better mechanical properties.The hardness and room temperature yield strength of the samples with 7%TiC are about 2.5 times and 3.0 times respectively of that without TiC,due to the strengthening effect of both TiC and Cr23C6 carbide reinforcements.

关 键 词：高熵合金 金属基复合材料 微观组织 力学性能 放电等离子烧结 

分 类 号：TF124[冶金工程—粉末冶金]