Flexural strength behavior of a ZrB2-TaB2 composite consolidated by non-reactive spark plasma sintering at 2300 °C

被引：20

作者：

Demirskyi, Dmytro ^{[1
]}

Vasylkiv, Oleg ^{[2
]}

机构：

[1] Nanyang Technol Univ, 50 Nanyang Ave, Singapore 639798, Singapore

[2] Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2017年 / 66卷

关键词：

Spark plasma sintering; Tantalum diboride; Zirconium diboride; Strength; Composite; CERAMIC COMPOSITES; ZIRCONIUM DIBORIDE; GRAIN-GROWTH;

D O I：

10.1016/j.ijrmhm.2017.02.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A bulk zirconium-tantalum diboride ceramic composite was consolidated by non-reactive spark plasma sintering (SPS) at 2300 degrees C. In order to consolidate the ZrB2-44 wt% TaB2 composite and restrict grain-growth, a special loading procedure was used. Pressure was applied and released at 2150 degrees C and 1250 degrees C, respectively. These SPS conditions allowed us to obtain a crack-free bulk composite with a grain size of 4-8 mu m. Flexural strength at temperatures up to 1800 degrees C was measured for the ZrB2-TaB2 composite. Importantly, at 1600 degrees C, the strength was 336 23 MPa, which is superior to that of monolithic ZrB2. Moreover, the ZrB2-TaB2 composite only showed plastic behavior at 1800 degrees C, a finding that is atypical for ZrB2-based ceramics. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：31 / 35

页数：5

共 28 条

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