High-temperature reactive spark plasma consolidation of TiB2-NbC ceramic composites

被引：58

作者：

Demirskyi, Dmytro ^{[1
,2
]}

Sakka, Yoshio ^{[1
]}

Vasylkiv, Oleg ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] Nanyang Technol Univ, Singapore 639798, Singapore

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 09期

基金：

日本学术振兴会;

关键词：

Spark plasma sintering; NbC; TiB2; Reaction sintering; Solid solution; TITANIUM DIBORIDE; MECHANICAL-PROPERTIES; TIB2-TIC COMPOSITES; DENSIFICATION; HARDNESS; POWDER; NI;

D O I：

10.1016/j.ceramint.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：

The TiB2-NbC ceramic system was consolidated by reactive spark plasma sintering (SPS). Densification, phase relations, microstructure evolution, and their effect on the properties of SPS-consolidated TiB2-NbC bodies were examined. The densification of TiB2 was enhanced by the addition of NbC, with 10 wt% NbC being the most effective. The phases that developed during reaction-driven consolidation of the NbC-TiB2 system at 2000 degrees C were (Nb,Ti) carbide and (Ti,Nb) diboride solid solutions and 1-2 mu m TiB2 grains. The best balance between hardness (24 GPa) and fracture toughness (6.8 MPa m(-2)) was found in 30 wt% NbC-TiB2 composites consolidated at 2000 degrees C for 5 min. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：10828 / 10834

页数：7

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