Preparation and sintering of nano Fe coated Si3N4 composite powders

被引：4

作者：

Yin Rui-ming ^{[1
,2
]}

Fan Jing-lian ^{[1
]}

Liu Xun ^{[1
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[2] Hunan Univ Technol, Coll Packaging & Mat Engn, Zhuzhou 412008, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2009年 / 16卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Fe; Si3N4; coating; heterogeneous precipitation; sintering; HETEROGENEOUS PRECIPITATION; VAPOR-DEPOSITION; HIGH-PERFORMANCE; PARTICLES; COATINGS; SILICON; GROWTH;

D O I：

10.1007/s11771-009-0031-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Fe/Si3N4 composite powder was synthesized by the heterogeneous precipitation-thermal reduction process, and then pressed into flakes under a pressure of 10 MPa. Flakes were sintered by pressureless and hot-pressing at 1 600 degrees C under 0.1 MPa N-2. The chemical composition, phases and microstructure of composite powder and sintered flakes were investigated by energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that the structure of composite powders is Si3N4 coated by nano Fe. The crystal phases of sintered flakes by pressureless are Fe(Si) compound, SiC and Si3N4. The crystal phases of the sintered samples by hot-pressing are Fe, Fe(Si) compound and Si3N4. It is found that crystal phases flakes obtained by pressureless and hot-pressing are very different.

引用

页码：184 / 189

页数：6

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