ZrC/Cr2AlC复合材料的微观结构及力学性能研究

doi:10.15541/jim20190143

无机材料学报 ›› 2020, Vol. 35 ›› Issue (1): 61-64.DOI: 10.15541/jim20190143

所属专题： MAX相和MXene材料；陶瓷基复合材料；结构陶瓷论文精选(2020)

ZrC/Cr₂AlC复合材料的微观结构及力学性能研究

徐维民,李世波(),胡树郡,姜吉鹏,于文波,周洋

北京交通大学机械与电子控制工程学院, 材料科学与工程中心, 北京 100044

收稿日期:2019-04-07 修回日期:2019-04-24 出版日期:2020-01-20 网络出版日期:2019-10-23
作者简介:徐维民(1996-), 男, 博士研究生. E-mail:18121371@bjtu.edu.cn
基金资助:
国家自然科学基金(51772020);北京市自然科学基金(2182058)

Fabrication and Mechanical Property of ZrC/Cr₂AlC Composites

XU Wei-Min,LI Shi-Bo(),HU Shu-Jun,JIANG Ji-Peng,YU Wen-Bo,ZHOU Yang

Center of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China

Received:2019-04-07 Revised:2019-04-24 Published:2020-01-20 Online:2019-10-23
About author:XU Wei-Min(1996-), male, PhD candidate. E-mail:18121371@bjtu.edu.cn
Supported by:
National Natural Science Foundation of China(51772020);Beijing Natural Science Foundation(2182058)

摘要/Abstract

摘要：

Cr₂AlC是MAX相家族中具有代表性的三元层状碳化物, 它兼具金属和陶瓷的特性, 有导电、耐腐蚀、抗氧化等优异性能。为进一步提高Cr₂AlC的综合性能, 本研究以ZrC为增强相, 利用热压烧结技术制备了ZrC/Cr₂AlC复合材料, 探讨了增强相含量(10vol%~20vol%)对材料力学性能的影响。结果表明: 10vol% ZrC/Cr₂AlC复合材料的弯曲强度和硬度分别为715 MPa和7 GPa。相比Cr₂AlC材料的强度(398 MPa)和硬度(3.4 GPa), 复合材料的强度和硬度提高幅度分别为80%和106%。采用扫描电子显微镜对材料的微观结构进行了分析, 阐明了复合材料具有较高性能的原因。本研究为拓宽Cr₂AlC材料的应用领域奠定了基础。

关键词: ZrC/Cr₂AlC, 复合材料, 力学性能, 微观结构

Abstract:

Cr₂AlC is a representative material in MAX phase family due to its combination of metallic and ceramic properties such as high electrical conductivity, high thermal conductivity, resistance to corrosion, good oxidation resistance. To further improve performance of Cr₂AlC, ZrC as a reinforcement was selected to reinforce Cr₂AlC matrix composites by hot pressing technique. Influence of ZrC content on the mechanical property of ZrC/Cr₂AlC composites has been investigated. The results showed that 10vol% ZrC/Cr₂AlC composite improved flexural strength (715 MPa) and Vickers hardness (7 GPa) by 80% and 106%, respectively, as compared with those of pure Cr₂AlC material. Date from this study indicate that Cr₂AlC MAX possesses broaden application potential.

Key words: ZrC/Cr₂AlC, composite, mechanical property, microstructure

中图分类号:

TQ174

徐维民, 李世波, 胡树郡, 姜吉鹏, 于文波, 周洋. ZrC/Cr₂AlC复合材料的微观结构及力学性能研究[J]. 无机材料学报, 2020, 35(1): 61-64.

XU Wei-Min, LI Shi-Bo, HU Shu-Jun, JIANG Ji-Peng, YU Wen-Bo, ZHOU Yang. Fabrication and Mechanical Property of ZrC/Cr₂AlC Composites[J]. Journal of Inorganic Materials, 2020, 35(1): 61-64.

图/表 4

图1 复合材料抛光表面背散射SEM照片 (a-b) 10vol% ZrC/Cr2AlC; (c) 15vol% ZrC/Cr2AlC; (b) Enlarged micrograph taken from (a)

Fig. 1 Back-scattered SEM images of polished surfaces of composites

图2 复合材料强度和硬度与ZrC含量关系图

Fig. 2 Flexural strength and Vickers hardness as a function of ZrC content

图3 10vol% ZrC/Cr2AlC复合材料的断口SEM照片 (a) Back-scattered SEM image; (b) Enlarged second electron image

Fig. 3 Fracture surfaces of 10vol% ZrC/Cr2AlC composite

图4 10vol% ZrC/Cr2AlC复合材料抛光表面压痕SEM照片 (a) Second electron image; (b) Enlarged back-scattered SEM image

Fig. 4 SEM micrographs of an indentation made by 10 kg on the polished surfaces of 10vol% ZrC/Cr2AlC composite

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ZrC/Cr₂AlC复合材料的微观结构及力学性能研究

Fabrication and Mechanical Property of ZrC/Cr₂AlC Composites

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