Fabrication of Aluminum/Aluminum Nitride Composites by Reactive Mechanical Alloying

Seung Hoon Yu; Kwang Seon Shin

doi:10.4028/www.scientific.net/MSF.534-536.181

Paper Titles

Vacuum Carburization of Nanometer Tungsten Powder with Carbon Black
p.165

Characteristics of Nanostructured WO₃-CuO Powder Mixture Produced by Ball Milling
p.169

Effect of Ag on the Thermoelectric Properties of Ag₂Se Alloy Prepared by Mechanical Alloying Process
p.173

Effect of Fe Doping on Thermoelectric Properties of Mechanically Alloyed CoSb₃
p.177

Fabrication of Aluminum/Aluminum Nitride Composites by Reactive Mechanical Alloying
p.181

Fabrication of TiH₂ Powders from Titanium Tuning Chip by Mechanical Milling
p.185

Formation of Fe₃AlC Base Alloy by Mechanical Alloying and Vacuum Hot Pressing
p.189

High Energy Ball Milling of Catalytically Synthesized Carbon Nanotubes
p.193

Mechanical Milling of Lithium with Metal Oxide and its Reactivity with Gases
p.197

HomeMaterials Science ForumMaterials Science Forum Vols. 534-536Fabrication of Aluminum/Aluminum Nitride...

Fabrication of Aluminum/Aluminum Nitride Composites by Reactive Mechanical Alloying

Abstract:

Various reactions and the in-situ formation of new phases can occur during the mechanical alloying process. In the present study, Al powders were strengthened by AlN, using the in-situ processing technique during mechanical alloying. Differential thermal analysis and X-ray diffraction studies were carried out in order to examine the formation behavior of AlN. It was found that the precursors of AlN were formed in the Al powders and transformed to AlN at temperatures above 600oC. The hot extrusion process was utilized to consolidate the composite powders. The composite powders were canned in an Al can and then extruded at elevated temperatures. The microstructure of the extrusions was examined by SEM and TEM. In order to investigate the mechanical properties of the extrusions, compression tests and hardness measurements were carried out. It was found that the mechanical properties and the thermal stability of the Al/AlN composites were significantly greater than those of conventional Al matrix composites.