In situ synthesis mechanism of Al2O3-Mo nanocomposite by ball milling process

被引：25

作者：

Heidarpour, A. ^{[1
]}

Karimzadeh, E. ^{[1
]}

Enayati, M. H. ^{[1
]}

机构：

[1] IUT, Dept Mat Engn, Nanotechnol & Adv Mat Inst, Esfahan 8415683111, Iran

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 477卷 / 1-2期

关键词：

Mechanosynthesis; Nanocomposite; Characterization; Al2O3-Mo; COMPOSITES; BEHAVIOR; MECHANOSYNTHESIS; FABRICATION; COMBUSTION; ENERGY; POWDER;

D O I：

10.1016/j.jallcom.2008.10.112

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Al2O3-Mo nanocomposites were synthesized by ball milling of aluminum and molybdenum oxide powder mixtures. The structural evaluation of powder particles after different milling times was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and measurement of vial temperature. The molybdenum oxide and aluminum reaction appeared to occur through a rapid combustion reaction process. As a result, an alumina matrix nanocomposite containing molybdenum particulate was formed. In final stage of milling, Mo and alumina had a crystallite size of about 28 nm and 60 nm, respectively. After annealing at 800 degrees C for 60 min, Mo crystallite size remained constant. However, alpha-alumina crystallite size increased to 120 nm. After annealing a partial transformation of alpha-Al2O3 into different polymorphic, gamma-Al2O3 with a crystallite size of 50 nm was observed. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：692 / 695

页数：4

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