Pressureless sintering of machinable Al2O3/LaPO4 composites in N2 atmosphere

被引：10

作者：

Gong, GL ^{[1
]}

Zhang, BL

Zhang, HR

Li, WL

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2006年 / 32卷 / 03期

关键词：

Al2O3/LaPO4; composite; pressureless sintering; machinable;

D O I：

10.1016/j.ceramint.2005.03.002

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：

Al2O3/LaPO4 composites were fabricated by pressureless sintering in N-2 atmosphere. The effect of sintering ternperature and sintering time on densification was examined, as well as the dependence of mechanical properties and microstructure on LaPO4 content. Provided the ratio of La/P was close to 1:1, no reactions were observed after 2 h at 1650 degrees C in N-2 atmosphere. The 30 wt.% LaPO4/Al2O3 composites could be machined using cemented carbide drills as those pressureless sintered in air. LaAl11O18 was formed when the composite was sintered at 1700 degrees C for 1 h in N-2 atmosphere, and the composites were not machinable. (c) 2005 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：349 / 352

页数：4

共 12 条

[1]

Davis JB, 1998, J AM CERAM SOC, V81, P2169

[2] Machinability of high-strength porous silicon nitride ceramics [J].

Kawai, C ;

Yamakawa, A .

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 1998, 106 (11) :1135-1137

[3] MAKING CERAMICS DUCTILE [J].

LAWN, BR ;

PADTURE, NP ;

CAI, HD ;

GUIBERTEAU, F .

SCIENCE, 1994, 263 (5150) :1114-1116

[4]

Marshall DB, 1998, J AM CERAM SOC, V81, P951, DOI 10.1111/j.1151-2916.1998.tb02432.x

[5] The effect of residual carbon on the phase stability of LaPO4 at high temperatures [J].

Mawdsley, JR ;

Halloran, JW .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2001, 21 (06) :751-757

[6] CERAMIC COMPOSITES OF MONAZITE AND ALUMINA [J].

MORGAN, PED ;

MARSHALL, DB .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1995, 78 (06) :1553-1563

[7] ENHANCED MACHINABILITY OF SILICON-CARBIDE VIA MICROSTRUCTURAL DESIGN [J].

PADTURE, NP ;

EVANS, CJ ;

XU, HHK ;

LAWN, BR .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1995, 78 (01) :215-217

[8]

ROPP RC, 1999, J AM CERAM SOC, V82, P1318

[9] Microstructure and mechanical properties of machinable Al2O3/LaPO4 composites by hot pressing [J].

Wang, RG ;

Pan, W ;

Chen, JA ;

Fang, MH ;

Jiang, MN ;

Cao, ZZ .

CERAMICS INTERNATIONAL, 2003, 29 (01) :83-89

[10] Properties and microstructure of machinable Al2O3/LaPO4 ceramic composites [J].

Wang, RG ;

Pan, W ;

Chen, JA ;

Jiang, MN ;

Luo, YM ;

Fang, MH .

CERAMICS INTERNATIONAL, 2003, 29 (01) :19-25

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