Fabrication and properties of TiB2-based cermets by spark plasma sintering with CoCrFeNiTiAl high-entropy alloy as sintering aid

被引：85

作者：

Ji, Wei ^{[1
]}

Zhang, Jinyong ^{[1
]}

Wang, Weimin ^{[1
]}

Wang, Hao ^{[1
]}

Zhang, Fan ^{[1
]}

Wang, Yucheng ^{[1
]}

Fu, Zhengyi ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2015年 / 35卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Titanium diboride; High-entropy alloy; Spark plasma sintering; Wettability; Microstructure; MECHANICAL-PROPERTIES; TITANIUM DIBORIDE; DENSIFICATION; BEHAVIOR; NITRIDE; IRON; CU;

D O I：

10.1016/j.jeurceramsoc.2014.10.024

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：

Equiatomic CoCrFeNiTiAl high-entropy alloy (HEA) fabricated by mechanical alloying (MA) was used as sintering aid for the densification of TiB2 by spark plasma sintering (SPS). The wettability between HEA and TiB2, the phases, microstructures and mechanical properties of the cermets were investigated. In the wetting analysis, excellent properties with a contact angle of 16.73 degrees at 1420 degrees C was confirmed via sessile drop method. For the TiB2-based ceramics, no brittle phases can be detected in the XRD patterns. TEM. observation revealed that there existed a narrow grain boundary between TiB2 and the HEA. A typical structure of HEA can be observed in the liquid phase. An optimized sintering temperature of 1600 degrees C was determined for the preparation of the TiB2-5 wt.% HEA ceramics with the combination of mechanical properties, including the relative density of 99.12%, the Vickers hardness of 2356 HV5 and the flexural strength of 800.2 MPa. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：879 / 886

页数：8

共 26 条

[1] The Nature of TiB2 Wetting by Cu and Au [J].