Reactive hot-pressing of ZrB2-ZrC-SiC ceramics via direct addition of SiC

被引：16

作者：

Lu, Ying ^{[1
,3
]}

Zhang, Guo-Jun ^{[2
]}

Liu, Ji-Xuan ^{[1
]}

Liu, Hu-Lin ^{[1
,3
]}

Wang, Xin-Gang ^{[1
]}

Xu, Fang-Fang ^{[1
]}

机构：

[1] Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Donghua Univ, Res Inst Funct Mat, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 15期

基金：

中国国家自然科学基金;

关键词：

Reactive hot-pressing; Zirconium diboride; Micro-layered structure; IN-SITU SYNTHESIS; MECHANICAL-PROPERTIES; ZRB2-BASED COMPOSITES; OXIDATION RESISTANCE; ZRB2-SIC COMPOSITES; ZRO2/SIC RATIO; DENSIFICATION; MICROSTRUCTURE; FABRICATION; ZIRCONIUM;

D O I：

10.1016/j.ceramint.2016.06.167

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：

A series of ZrB2-ZrC-SiC composites with various SiC content from 0 to 20 vol% were prepared by reactive hot-pressing using Zr, B4C and SiC as raw materials. Self-propagating high-temperature synthesis (SHS) occurred, and ZrC grains connected each other to form a layered structure when the SiC content is below 20 vol%. The evolution of microstructure has been discussed via reaction processes. The composite with 10 vol% SiC presents the most excellent mechanical properties (four-point bending strength: 828.6 +/- 49.9 MPa, Vickers hardness: 19.9 +/- 0.2 GPa) and finest grain size (ZrB2: 1.52 mu m, ZrC: 1.07 mu m, SiC: 0.79 mu m) among ZrB2-ZrC-SiC composites with various SiC content from 0 to 20 vol%. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：16474 / 16479

页数：6

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