Studies on wear behavior of nano-intermetallic reinforced Al-base amorphous/nanocrystalline matrix in situ composite

✍ Scribed by D. Roy; S.S. Singh; B. Basu; W. Lojkowski; R. Mitra; I. Manna

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 892 KB
• Volume: 266
• Category: Article
• ISSN: 0043-1648
• DOI: 10.1016/j.wear.2009.03.015

✦ Synopsis

Resistance to wear is an important factor in design and selection of structural components in relative motion against a mating surface. The present work deals with studies on fretting wear behavior of in situ nano-Al 3 Ti reinforced Al-Ti-Si amorphous/nanocrystalline matrix composite, processed by high pressure (8 GPa) sintering at room temperature, 350, 400 or 450 • C. The wear experiments were carried out in gross slip fretting regime to investigate the performance of this composite against Al 2 O 3 at ambient temperature (22-25 • C) and humidity (50-55%). The highest resistance to fretting wear has been observed in the composites sintered at 400 • C. The fretting wear involves oxidation of Al 3 Ti particles in the composite. A continuous, smooth and protective tribolayer is formed on the worn surface of the composite sintered at 400 • C, while fragmentation and spallation leads to a rougher surface and greater wear in the composite sintered at 450 • C.