水基流延成型制备 ZrB2 和 ZrB2-20vol% SiC 复合材料的微观结构和抗热震性能

doi:10.3724/SP.J.1077.2011.00244

无机材料学报 ›› 2011, Vol. 26 ›› Issue (3): 244-248.DOI: 10.3724/SP.J.1077.2011.00244

水基流延成型制备 ZrB₂ 和 ZrB₂-20vol% SiC 复合材料的微观结构和抗热震性能

吕志翚¹, ², 江东亮¹,张景贤¹, 林庆玲¹,黄政仁¹

1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室, 上海 200050; 2. 中国科学院研究生院,北京100049

收稿日期:2010-05-17 修回日期:2010-07-08 出版日期:2011-03-20 网络出版日期:2011-02-18
作者简介:吕志翚(1985-), 男, 博士研究生.
基金资助:
国家自然科学基金 (50772128); 上海市重大基础研究项目(07DJ14001); 上海市浦江人才计划(07PJ14094)

Microstructure and Thermal Shock Resistance of ZrB₂ and ZrB₂-20vol% SiC Compositesfrom Aqueous Tape Casting

Li Zhi-Hui¹, ², JIANG Dong-Liang¹, ZHANGJing-Xian¹, LIN Qing-Ling¹, HUANG Zheng-Ren¹

1. State KeyLaboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050,China ; 2. Graduate University of theChinese Academy of Sciences, Beijing 100049,China

Received:2010-05-17 Revised:2010-07-08 Published:2011-03-20 Online:2011-02-18
Supported by:
National Nature ScienceFoundation of China (50772128); Major Fundamental Research Program of Shanghai(07DJ14001); Shanghai Pujiang Program (07PJ14094)

摘要/Abstract

摘要： 研究了水基流延成型和热压烧结制备的ZrB₂和ZrB₂-20vol%SiC(ZS20)材料的微观结构和抗热震性能. 在ZS20材料中分别观察到了Zr-B-C和Zr-B-W固溶相,而在ZrB₂材料中并未发现有固溶相.固溶相的形成使得晶格参数减小, 因此ZS20材料中ZrB₂的衍射峰向高角度偏移.采用淬火法测得ZrB₂和ZS20材料的临界热震温度分别为298℃和306℃,并将实验值与理论计算值进行比较. ZrB₂基体与SiC第二相及固溶相之间由于热膨胀系数的差异而在材料内部引入应力,因而ZS20材料抗热震性能的实验值低于理论计算值.

关键词: ZrB₂, ZrB₂-20vol%SiC, 微观结构, 抗热震性能

Abstract: The microstructure and thermal shock resistance of ZrB₂ and ZrB₂-20vol% SiC(ZS20) composites prepared by aqueous tape casting and hot-pressing were investigated. Zr-B-C and Zr-B-W solid solution phases were formed in ZS20 composites, but not formed in ZrB₂ samples. The diffraction peaks for ZrB₂ of ZS20 composites shifted to higher 2 θ values possibly due to the formation of solidsolution phases which resulted in a decrease in lattice parameters. The critical thermal shock values for ZrB₂ and ZS20 were measured to be298℃ and 306℃ respectively using water quench tests. The thermal shock resistance of ZrB₂ and ZS20 were also calculated and compared with the experimental data. The results revealed that the measured thermal shock resistance of ZS20 composites was lower than the calculated ones, which might be due to the thermal residualstress in the samples resulted from the difference in thermal expansion coefficient of ZrB₂ matrix and SiC second phase as well as the solid solutions phases.

Key words: ZrB₂, ZrB₂-20vol% SiC, microstructure, thermal shock resistance

中图分类号:

TQ174

吕志翚, 江东亮, 张景贤, 林庆玲, 黄政仁. 水基流延成型制备 ZrB₂ 和 ZrB₂-20vol% SiC 复合材料的微观结构和抗热震性能[J]. 无机材料学报, 2011, 26(3): 244-248.

Lv Zhi-Hui, , JIANG Dong-Liang, ZHANGJing-Xian, LIN Qing-Ling, HUANG Zheng-Ren. Microstructure and Thermal Shock Resistance of ZrB₂ and ZrB₂-20vol% SiC Compositesfrom Aqueous Tape Casting[J]. Journal of Inorganic Materials, 2011, 26(3): 244-248.

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水基流延成型制备 ZrB₂ 和 ZrB₂-20vol% SiC 复合材料的微观结构和抗热震性能

Microstructure and Thermal Shock Resistance of ZrB₂ and ZrB₂-20vol% SiC Compositesfrom Aqueous Tape Casting

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