Microstructural development during spark plasma sintering of ZrB2-SiC-Ti composite

被引：94

作者：

Ghasali, Ehsan ^{[1
]}

Asl, Mehdi Shahedi ^{[2
]}

机构：

[1] Mat & Energy Res Ctr, Dept Ceram, Alborz, Iran

[2] Univ Mohaghegh Ardabili, Dept Mech Engn, Ardebil, Iran

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷 / 15期

关键词：

ZrB2-SiC composite; Spark plasma sintering; Ti addition; Microstructure; Phase evolution; In-situ formed compounds; HOT-PRESSING PARAMETERS; MECHANICAL-PROPERTIES; ZRB2-BASED COMPOSITES; FRACTOGRAPHICAL CHARACTERIZATION; ZRO2/SIC RATIO; C-SF; DENSIFICATION; HARDNESS; ZRB2; TEMPERATURE;

D O I：

10.1016/j.ceramint.2018.07.011

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 present study investigates the effect of Ti addition on the microstructure development and phase evolution during spark plasma sintering of ZrB2-SiC ceramic composite. A ZrB2-20 vol% SiC sample with 15 wt% Ti was prepared by high-energy milling and spark plasma sintering at 2000 degrees C for 7 min under 50 MPa. The X-ray diffraction test, microstructural studies and thermodynamic assessments indicated the in-situ formation of several compounds due to the chemical reactions of Ti with ZrB2 and SiC. The Ti additive was completely consumed during the sintering process and converted to the ceramic compounds of TiC, TiB and TiSi2. In addition, another refractory phase of ZrC was also formed as a result of sidelong reaction of ZrB2 and SiC with the Ti additive.

引用

页码：18078 / 18083

页数：6

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