Synthesis of Cr2AlC from Elemental Powders with Modified Pressureless Spark Plasma Sintering

被引：12

作者：

Ge Mengni ^{[1
]}

Wang Xiaofan ^{[1
]}

Li Gaiye ^{[1
]}

Lu Chen ^{[1
]}

Zhang Jianfeng ^{[1
]}

Tu Rong ^{[2
]}

机构：

[1] Hohai Univ, Coll Mech & Mat, Nanjing 210098, Jiangsu, Peoples R China

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

来源：

JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION | 2019年 / 34卷 / 02期

关键词：

pressureless spark plasma sintering; Cr2AlC; reaction mechanism; AB-INITIO CALCULATIONS; MECHANICAL-PROPERTIES; CERAMICS; TI2ALN;

D O I：

10.1007/s11595-019-2048-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We introduced a modified pressureless sintering strategy by SPS with a new T-shape die and tapered punches, which helps the evaporation of melted Al and reduces the sample sticking with the inner wall of the die. Thus, the die breaking risk in the sintering process or the de-molding process is avoided at all. At a low temperature and short holding time, a high purity of Cr2AlC was obtained in this SPS process from the optimization of different molar ratios of raw materials. Simultaneously, the high porosity of the as-obtained sample was also a distinguishing feature worth noticing. The reaction mechanism for this process was also discussed in detail. This study presented a new venue for future development of high purity MAX materials and others related materials by a modified pressureless sintering strategy.

引用

页码：287 / 292

页数：6