Elevated temperature strength and thermal shock behavior of hot-pressed Cf-TiC composites.pdf

下载文档

9
0
约3万字
约 8页
2017-04-06 发布于江苏
举报
版权申诉
保障服务

Elevated temperature strength and thermal shock behavior of hot-pressed Cf-TiC composites.pdf

1、本文档共8页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。

Elevated temperature strength and thermal shock behavior of hot-pressed Cf-TiC composites

Elevated temperature strength and thermal shock behavior of hot-pressed carbon fiber reinforced TiC composites Gui-Ming Songa,*, Ying Wub, Qiang Lia,c aSchool of Materials Science and Engineering, PO Box 433, Harbin Institute of Technology, Harbin 150001, PR China bBeijing General Research Institute of Mining and Metallurgy, Beijing 100044, PR China cSchool of Materials Science and Engineering, Fuzhou University, Fuzhou 350002, PR China Received 11 January 2001; received in revised form 11 April 2001; accepted 28 April 2001 Abstract In order to improve the elevated strength and thermal shock resistance of TiC materials, 20vol% short carbon fiber-reinforced TiC composite (Cf/TiC) was produced by hot pressing. With carbon fiber addition, the strength and fracture toughness of TiC is increased remarkably, and the elastic modulus and thermal expansion coefficient are decreased. The strength value of Cf/TiC composite is 593 MPa at room temperature and 439 MPa at 1400C, and the fracture toughness value at room temperature is 6.87 MPa m1/2. The thermal stress fracture resistance parameter, R, thermal stress damage resistance parameter, RIV, and thermal stress crack stability parameter, Rst, are all increased. The residual strength decreases significantly when the thermal shock temperature difference, T, is higher than 900C, and the residual strength is 252 MPa when T is 1400C. Carbon fiber reinforced-TiC com- posite exhibits superior resistance to thermal shock damage compared with monolithic TiC. The catastrophic failure induced by severe thermal stresses can be prevented in Cf/TiC composite. # 2002 Elsevier Science Ltd. All rights reserved. Keywords: Carbon fiber; Composites; Mechanical properties; Thermal shock resistance; TiC 1. Introduction As one of the most promising high-temperature cera- mic materials, TiC has been under active development for demanding elevated temperature applications for its unique combination of higher melting point (3067C), good streng