Silicon nitride nanoceramics densified by dynamic grain sliding

被引：29

作者：

Herrmann, Mathias ^{[2
]}

Shen, Zhijian ^{[1
]}

Schulz, Ingrid ^{[3
]}

Hu, Jianfeng ^{[1
]}

Jancar, Bostjan ^{[4
]}

机构：

[1] Stockholm Univ, Dept Mat & Environm Chem, Arrhenius Lab, S-10692 Stockholm, Sweden

[2] Fraunhofer Inst Ceram Technol & Sintered Mat, D-01277 Dresden, Germany

[3] Tech Univ Dresden, Inst Werkstoffwissensch, D-01307 Dresden, Germany

[4] Jozef Stefan Inst, Adv Mat Dept, SI-1000 Ljubljana, Slovenia

来源：

JOURNAL OF MATERIALS RESEARCH | 2010年 / 25卷 / 12期

基金：

瑞典研究理事会;

关键词：

CERAMICS;

D O I：

10.1557/JMR.2010.0313

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The densification behaviors of two silicon nitride nanopowder mixtures based respectively on alpha-Si3N4 and beta-Si3N4 as the major phase constituent were studied by spark plasma sintenng Sintering conditions were established where a low viscous liquid not in equilibrium with the main crystalline constituent(s) stimulated the grain sliding yet did not activate the reprecipitation mechanism that unavoidably yields grain growth By this way of dynamic gram sliding full densification of silicon nitride nanoceramics was achieved with no noticeable involvement of alpha- to beta-Si3N4 phase transformation and grain growth This processing principle opens the way toward flexible and precise tailoring of the microstructures and properties of Si3N4 ceramics The obtained silicon nitride nanoceramics showed improved wear resistance, particularly under higher Hertzian stresses

引用

页码：2354 / 2361

页数：8

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