HIGH-TOUGHNESS CE-TZP/AL2O3 CERAMICS WITH IMPROVED HARDNESS AND STRENGTH

被引：107

作者：

CUTLER, RA ^{[1
]}

MAYHEW, RJ ^{[1
]}

PRETTYMAN, KM ^{[1
]}

VIRKAR, AV ^{[1
]}

机构：

[1] UNIV UTAH,DEPT MAT SCI & ENGN,SALT LAKE CITY,UT 84112

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1991年 / 74卷 / 01期

关键词：

D O I：

10.1111/j.1151-2916.1991.tb07315.x

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：

Simultaneous additions of SrO and Al2O3 to ZrO2(12 mol% CeO2) lead to the in situ formation of strontium aluminate (SrO.6Al2O3) platelets (almost-equal-to 0.5-mu-m in width and 5 to 10-mu-m in length) within the Ce-TZP matrix. These platelet-containing Ce-TZP ceramics have the strength (500 to 700 MPa) and hardness (13 to 14 GPa) of Ce-TZP/Al2O3 while maintaining the high toughness (14 to 15 MPa.m1/2) of Ce-TZP. Optimum room-temperature properties are obtained at SrO/Al2O3 molar ratios between 0.025 and 0.1 for ZrO2(12 mol% CeO2) with starting Al2O3 contents ranging between 15 and 60 vol%. The role of various toughening mechanisms is discussed for these composite ceramics.

引用

页码：179 / 186

页数：8

共 33 条

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