Effects of B4C particle size on pore structures of porous TiB2-TiC by reaction synthesis

被引：27

作者：

Cui, Hongzhi ^{[1
]}

Liu, Wei ^{[1
]}

Cao, Lili ^{[1
]}

Song, Qiang ^{[1
]}

Tian, Jian ^{[1
]}

Teng, Fanglei ^{[1
]}

Wang, Jun ^{[1
]}

机构：

[1] Shandong Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266590, Shandong, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2015年 / 35卷 / 13期

基金：

国家高技术研究发展计划(863计划);

关键词：

Porous materials; TiB2-TiC; Reaction synthesis; Pore structure; SHS; COMBUSTION SYNTHESIS; MECHANICAL-PROPERTIES; TIB2/TIC COMPOSITES; TIC-TIB2; COMPOSITES; PHASE; MICROSTRUCTURE; CERAMICS;

D O I：

10.1016/j.jeurceramsoc.2015.05.022

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Porous TiB2-TiC were prepared by SHS using Ti and B4C powder mixtures. The pores, phase constituents, microstructures and composition distribution of TiB2-TiC were analyzed. The influences of B4C particle size and pressure in green compacts on pore sizes and structures of final products were also discussed. Via combustion front quenching, the reaction process between Ti and B4C particles was achieved. The results showed that the pore size decreased and combination between TiB2 and TiC became closer with the decrease of B4C particle size and increase of pressure. During the reaction, B4C particles decomposed layer by layer, and reacted with the melted Ti to form poor boron phases of TiB and Ti-3 B-4 with needle-like shapes, which existed in quenched samples. With further reacting, TiB and Ti3B4 phases gradually changed to TiB2 with rectangle and hexagonal-plate shapes. The regular TiB2 particles were bound together by TiC, which constructed the skeleton of pores. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：3381 / 3388

页数：8

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