Mechanical properties of SiC ceramics sintered with RE2O3 (RE: Sc, Lu, Y) and AlN additives

被引：0
|
作者：
B. V. Manoj Kumar
Myong-Hoon Roh
Young-Wook Kim
Wonjoong Kim
Sang-Whan Park
机构：
[1] University of Seoul,Department of Materials Science and Engineering
[2] Korea Institute of Science and Technology,Materials Science and Technology Research Division
来源：
Metals and Materials International | 2010年 / 16卷
关键词：
ceramics; sintering; mechanical properties; scanning electron microscopy (SEM); silicon carbide;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Highly densified Silicon Carbide (SiC) ceramics with 10 vol.% sintering additives, RE2O3 (RE: Sc, Lu, Y) and AlN, were prepared via hot pressing in N2 atmosphere. The influence of sintering additive composition on the mechanical properties of the sintered specimens is discussed. The Sc2O3-AlN system consisted of equi-axed grain structure, while the Lu2O3-AlN and Y2O3-AlN systems rendered largely grown platelet grains. While fracture toughness was enhanced with regards to the contribution of crack deflection and crack bridging mechanisms for intergranular fracture, strength remained almost the same for all specimens.
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页码：229 / 233
页数：4
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