Polymer-filler derived Mo2C ceramics

被引：28

作者：

Kaindl, A ^{[1
]}

Lehner, W

Greil, P

Kim, DJ

机构：

[1] Univ Erlangen Nurnberg, Dept Mat Sci, D-8520 Erlangen, Germany

[2] Sungkyunkwan Univ, Dept Mat Engn, Suwon, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 260卷 / 1-2期

关键词：

ceramic hard materials; Mo2C; polymer derived ceramic composites; polysiloxane; reactive filler;

D O I：

10.1016/S0921-5093(98)00987-3

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Manufacturing, microstructure and properties of novel reaction bonded Mo2C materials derived from polymer/reactive filler mixtures were investigated. Mo powder was used as a filler to react with carbon bearing decomposition products of poly(methyl- and phenysiloxanes) during pyrolysis in nitrogen atmosphere. Microcrystalline composites with the filler reaction products Mo3C, Mo,Si, Mo,Si, embedded in a silicon oxycarbide glass matrix could be formed with complex geometry owing to near net shape polymer/ceramic conversion. Depending on the precursor composition and pyrolysis conditions, ceramic hard materials with a density up to 97% theoretical density, a hardness of 10 GPa, a Young's Modulus of 250 GPa, a fracture toughness of 5 MPam(1/2) and a flexural strength of 330 MPa were obtained. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：101 / 107

页数：7

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