添加W对ZrB_(2)-SiC复合材料的微观组织、力学性能和氧化行为的影响  

Effect of W Addition on Microstructure,Mechanical Properties,and Oxidation Behavior of ZrB_(2)-SiC Composites

作　　者：高中堂 卢佳炜 于源[2,3,4] 王毅飞 余德锋[1] 李彤阳 王鲁杰 汤华国 乔竹辉 Gao Zhongtang;Lu Jiawei;Yu Yuan;Wang Yifei;Yu Defeng;Li Tongyang;Wang Lujie;Tang Huaguo;Qiao Zhuhui(College of Mechanical Engineering,Xi'an University of Science and Technology,Xi'an 710054,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Shandong Laboratory of Yantai Advanced Materials and Green Manufacture,Yantai 264006,China;Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering,Yantai 264006,China;Northwest Institute for Nonferrous Metal Research,Xi'an 710016,China)

机构地区：[1]西安科技大学机械工程学院,陕西西安710054 [2]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [3]烟台先进材料与绿色制造山东省实验室,山东烟台264006 [4]烟台中科先进材料与绿色化工产业技术研究院,山东烟台264006 [5]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2023年第9期3003-3011,共9页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51804251,52104384);Science Fund of Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing(AMGM2021F04);Shandong Provincial Natural Science Foundation(ZR2021ME168,ZR2021JQ20);Planning Project of Xiology(21XJZZ0041);LICP Cooperation Foundation for Young Scholars(HZJJ21-07);Taishan Scholars Program of Shandong Province;Yo’an Science and Technuth Innovation Promotion Association(CAS 2021423);Key Research and Development Program of Shaanxi(2023-YBGY-343)。

摘　　要：通过放电等离子烧结技术制备了添加不同W含量(1%,3%和5%,体积分数,下同)的ZrB_(2)-SiC复合材料,研究了烧结过程中复合材料的致密化行为,分析了添加W对复合材料微观组织演化、相组成、力学性能和氧化行为的影响。结果表明:W的添加使复合材料的微观组织表现出核壳结构,以ZrB_(2)晶粒为核,原位形成的(Zr,W)B_(2)固溶体为壳,有效地促进了复合材料的致密化和晶粒细化。对比不含W的复合材料,含W复合材料的维氏硬度、抗弯曲强度和断裂韧性显著提高,W添加含量在3%时力学性能最优,复合材料表现出最佳的硬度、强度和韧性。随着W添加量从0%增加到5%,复合材料的氧化增重和氧化层厚度逐渐减小。当W添加量为5%时,复合材料的SiC贫化层消失。最后,详细说明了W的添加对复合材料性能的影响机制。The ZrB_(2)-SiC composites with refractory metal W of different contents(1vol%,3vol%,and 5vol%)were prepared by spark plasma sintering.The densification behavior of composites during sintering process was investigated.The influence of W additions on the microstructure evolution,phase composition,mechanical properties,and oxidation behavior of W-doped composites was studied.Results show that the W addition leads to the formation of core-shell structures in the composites,where the ZrB_(2)grains are considered as the core and the in-situ formed(Zr,W)B_(2) solid solution is considered as the shell,thereby effectively promoting the grain refinement and composite densification.Compared with those of the W-free composites,the Vickers hardness,flexural strength,and fracture toughness of W-doped composites are enhanced.The optimal mechanical properties can be achieved at W addition content of 3vol%:the highest hardness,strength,and toughness can be obtained for the composites.The mass gain and oxide scale thickness of composites are gradually decreased with increasing the W addition from 0vol%to 5vol%.When the W addition in composite is 5vol%,the SiC-depleted layer disappears.Finally,the influence mechanism of W addition on the performance of composites is discussed.

关 键 词：ZrB_(2)-SiC复合材料 致密化 微观组织 力学性能 氧化行为 

分 类 号：TB332[一般工业技术—材料科学与工程]