Plasma-sprayed nanostructured Al2O3/TiO2 powders and coatings

被引：82

作者：

Kear, BH ^{[1
]}

Kalman, Z ^{[1
]}

Sadangi, RK ^{[1
]}

Skandan, G ^{[1
]}

Colaizzi, J ^{[1
]}

Mayo, WE ^{[1
]}

机构：

[1] Rutgers State Univ, Ctr Nanomat Res, Piscataway, NJ 08854 USA

来源：

JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2000年 / 9卷 / 04期

关键词：

air plasma spray; metastable phases; nanostructures; oxide coatings;

D O I：

10.1007/BF02608550

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Air plasma spray has been used to produce metastable oxide-ceramic powders and coatings, starting with commercially available Al2O3/13TiO(2) powder feed. The feed material undergoes rapid melting and homogenization in the high-temperature zone of the plasma jet. A metastable x-Al2O3. TiO2 phase is formed when the molten droplets are quenched on a chilled substrate. The metastable phase has a defect spinel structure and a nanocrystalline grain size. When heated, it decomposes into an equilibrium two-phase structure, consisting of alpha -Al2O3 and beta -Al2O3. TiO2. Both types of ceramic materials have potential as hard, wear-resistant coatings.

引用

页码：483 / 487

页数：5

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