Preparation of porous YB4 ceramics using a combination of in-situ borothermal reaction and high temperature partial sintering

被引：36

作者：

Guo, Qiangqiang ^{[1
]}

Xiang, Huimin ^{[1
]}

Sun, Xin ^{[1
]}

Wang, Xiaohui ^{[2
]}

Zhou, Yanchun ^{[1
]}

机构：

[1] Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composite Lab, Beijing 100076, Peoples R China

[2] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2015年 / 35卷 / 13期

基金：

中国国家自然科学基金;

关键词：

YB4; Ultra-high temperature ceramics; Porous materials; Strength; Borothermal reaction; ALUMINA CERAMICS; BEHAVIOR; POWDER; ZRO2;

D O I：

10.1016/j.jeurceramsoc.2015.05.023

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 novel method for preparing high porosity and high strength porous YB4 ceramics was developed combining the in-situ borothermal reaction synthesis and high temperature partial sintering. Since pores could be produced by gasses such as B2O3 and CO generated in the reaction between Y2O3 and B4C, high porosity porous YB4 ceramics were obtained after synthesis at 1650 degrees C and sintering at 1780 degrees C for 2 h in vacuum, respectively. Using this new and simple method, porous YB4 with controllable porosities of 60-70% and compressive strengths of 7.4-19.9 MPa were obtained depending on the green density. The phase composition, porosity, pore size distribution and compressive behavior of the porous YB4 ceramics were systematically investigated. The effects of vacuum on synthesis of YB4 and pore forming mechanism were also discussed in detail. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：3411 / 3418

页数：8

共 35 条

[1] Hierarchically Porous Ceramics from Diatomite Powders by Pulsed Current Processing [J].

Akhtar, Farid ;

Vasiliev, Petr O. ;

Bergstrom, Lennart .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2009, 92 (02) :338-343

[2] In praise of pores [J].

Colombo, Paolo .

SCIENCE, 2008, 322 (5900) :381-383

[3] COMPRESSIVE BEHAVIOR AND DEFORMATION-MODE MAP OF AN OPEN CELL ALUMINA [J].

DAM, CQ ;

BREZNY, R ;

GREEN, DJ .

JOURNAL OF MATERIALS RESEARCH, 1990, 5 (01) :163-171

[4] Role of Zr(OH)4 hard agglomerates in fabricating porous ZrO2 ceramics and the reinforcing mechanisms [J].

Deng, ZY ;

Zhou, Y ;

Inagaki, Y ;

Ando, M ;

Ohji, T .

ACTA MATERIALIA, 2003, 51 (03) :731-739

[5] Microstructure and mechanical properties of porous alumina ceramics fabricated by the decomposition of aluminum hydroxide [J].

Deng, ZY ;

Fukasawa, T ;

Ando, M ;

Zhang, GJ ;

Ohji, T .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2001, 84 (11) :2638-2644

[6] Bulk alumina support with high tolerant strain and its reinforcing mechanisms [J].

Deng, ZY ;

Fukasawa, T ;

Ando, M ;

Zhang, GJ ;

Ohji, T .

ACTA MATERIALIA, 2001, 49 (11) :1939-1946

[7] Fabrication of mullite-bonded porous silicon carbide ceramics by in situ reaction bonding [J].

Ding, Shuqiang ;

Zhu, Sumin ;

Zeng, Yu-Ping ;

Jiang, Dongliang .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2007, 27 (04) :2095-2102

[8]

Gibson LJ., 1997, CELLULAR SOLIDS STRU, DOI DOI 10.1017/CBO9781139878326

[9] Cellular ceramics: Intriguing structures, novel properties, and innovative applications [J].

Green, DJ ;

Colombo, R .

MRS BULLETIN, 2003, 28 (04) :296-300

[10] Reaction Processes and Characterization of ZrB2 Powder Prepared by Boro/Carbothermal Reduction of ZrO2 in Vacuum [J].

Guo, Wei-Ming ;

Zhang, Guo-Jun .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2009, 92 (01) :264-267

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