Low volume fraction in situ (Ti5Si3 + Ti2C)/Ti hybrid composites with network microstructure fabricated by reaction hot pressing of Ti-SiC system
Low volume fraction in situ (Ti5Si3 + Ti2C)/Ti hybrid composites with network microstructure fabricated by reaction hot pressing of Ti-SiC system
复制标题
Ti-SiC体系反应热压制备具有网络微结构的低体积分数原位(Ti5Si3 Ti2C)/Ti杂化复合材料
DOI：
10.1016/j.compscitech.2013.03.025
复制
发表时间：
2013-06-18
影响因子：
9.1
通讯作者：
Peng, H. X.
中科院分区：
文献类型：
--
作者：
Huang, L. J.;Wang, S.;Peng, H. X.
采用反应热压法（RHP）制备了具有低体积分数增强体和新型网络结构的原位混杂Ti 5Si 3/Ti 2C复合材料（（Ti 5Si 3 + Ti 2C）/Ti）。采用大颗粒球形纯Ti和细颗粒SiC，通过低能球磨和反应热压制备了具有网状结构的复合材料。通过Ti和SiC反应原位合成了Ti 5Si 3棒和Ti 2C颗粒，并分散在大颗粒纯Ti周围，形成独特的网状结构。通过定制一种新型的网络结构和引入原位混杂增强体，所制备的复合材料的屈服强度或塑性得到显著提高。特别地，具有1体积%的复合材料的强度和延展性两者都提高。增强，显着增强相比，单片纯钛。这可能是由于网络组织的形成、基体晶粒的细化和原位混杂增强体的合成。此外，随着增强体的体积分数增加到1体积%以上，观察到强度增加和延展性降低。(C)2013爱思唯尔有限公司保留所有权利。
In situ hybrid Ti5Si3 rods and Ti2C particles reinforced pure titanium matrix composites ((Ti5Si3 + Ti2C)/Ti) with a low volume fraction of reinforcements and a novel network microstructure were successfully fabricated by reaction hot pressing (RHP) of the Ti-SiC system. In order to tailor the network microstructure, large spherical pure Ti particles and fine SiC particles were selected followed by low energy ball milling and reaction hot pressing. Ti5Si3 rods and Ti2C particles were in situ synthesized by the reaction between the Ti and SiC phases and dispersed around the large pure Ti particles forming a unique network microstructure. The yield strength or ductility of the fabricated composites were remarkably improved by tailoring a novel network microstructure and introducing in situ hybrid reinforcements. In particular, both the strength and the ductility of the composite, having 1 vol.% reinforcement, are significantly enhanced compared with that of monolithic pure Ti. This can be attributed to formation of the network microstructure, matrix grain refinement and synthesis of in situ hybrid reinforcements. Furthermore, with increasing volume fraction of reinforcements above 1 vol.%, an increased strength and a decreased ductility were observed. (C) 2013 Elsevier Ltd. All rights reserved.