Change of Morphology during Heating of Amorphous Composite Powder in Si3N4-BN System (特集 アモルファス・ナノ結晶制御と高機能材料)
スポンサーリンク
概要
- 論文の詳細を見る
Amorphous composite powders are useful to fabricate ceramic nanocomposite. The nanostructure is formed by phase separation and crystallization during sintering. Si<SUB>3</SUB>N<SUB>4</SUB>-BN composite powder was prepared by a vapor phase reaction method and heated in N<SUB>2</SUB> with and without Y<SUB>2</SUB>O<SUB>3</SUB>-Al<SUB>2</SUB>O<SUB>3</SUB> sintering aid. Particle coarsening was observed above 1400°C in monolithic Si<SUB>3</SUB>N<SUB>4</SUB>, whereas the particle growth was retarded in Si<SUB>3</SUB>N<SUB>4</SUB>-BN composite. α-Si<SUB>3</SUB>N<SUB>4</SUB> was detected above 1400°C in monolithic Si<SUB>3</SUB>N<SUB>4</SUB>, but Si<SUB>3</SUB>N<SUB>4</SUB>-BN composite was still amorphous even at 1600°C. When the sintering aid was used, β-Si<SUB>3</SUB>N<SUB>4</SUB> was formed at 1600°C in monolithic Si<SUB>3</SUB>N<SUB>4</SUB> and Si<SUB>3</SUB>N<SUB>4</SUB>-BN composite. The phase separation of BN was investigated by IR spectroscopy. The phase separation of Si<SUB>3</SUB>N<SUB>4</SUB>-BN composite powder became significant at 1600°C and the crystallization was stimulated by the sintering aid. It was confirmed from TEM observation that BN was segregated on the surface of Si<SUB>3</SUB>N<SUB>4</SUB> particle.
- 社団法人 粉体粉末冶金協会の論文
- 2000-04-15
著者
-
UEHARA Masato
Department of Veterinary Medicine, Tottori University
-
Hojo Junichi
Department of Applied Chemistry, Faculty of Engineering, Kyushu University
-
Uehara Masato
Department Chemistry & Biochemistry Graduate School Of Engineering Kyushu University
-
MAEDA Hideaki
Department of Molecular and Material Sciences, Interdiscplinary Graduate School of Engineering Scien
-
Eto Koji
Department Of Medicine (cardiology) Teikyo University School Of Medicine
-
Eto Koji
Department Chemistry & Biochemistry Graduate School Of Engineering Kyushu University
-
Hojo J
Kyushu Univ. Fukuoka
-
Hojo Junichi
Department Of Applied Chemistry Faculty Of Engineering Kyushu University
-
Maeda H
National Institute Of Advanced Industrial Science And Technology
-
Maeda Hideaki
Department Chemistry & Biochemistry Graduate School Of Engineering Kyushu University
-
Hojo Junichi
Department Chemistry & Biochemistry, Graduate School of Engineering, Kyushu University
関連論文
- Effect of AlN additive on densification, microstructure and strength of liquid-phase sintered SiC ceramics by spark plasma sintering
- Synthesis and characterization of TiO2-coated SiO2 particles by hydrolysis of titanium alkoxide in alcohol solvents
- Relationship between Distribution of Tapetum Fibrosum and Retinal Pigment Epithelium in the Sheep Eye
- Distribution of Astroglial Lineage Cells in Developing Chicken Telencephalon from Embryo to Young Chick
- Expression of sonic hedgehog regulates morphological changes of rat developing cerebellum in hypothyroidism
- Nanostructured silicon carbide ceramics fabricated through liquid-phase sintering by spark plasma sintering
- Synthesis of Ca3Sc2Si3O12:Ce3+ phosphor via newly developed emulsion route
- Temperature Measurement of Microfluid Using Core/Shell Composite Nanocrystals
- High Temperature Preparation of Core and Core/Shell Composite Nanocrystals in a Multiphase Microreactor
- Micro-Space Synthesis of Core-Shell-Type Semiconductor Nanocrystals for Thermosensing