Wear behavior of bulk Zr 41 Ti 14 Cu 12.5 Ni 10 Be 22.5 metallic glasses
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Wear behavior of bulk Zr41Ti14Cu12.5Ni10Be22.5 metallic glasses Gong Li,a) College of Materials Science and Engineering, Yanshan University, Qinhuangdao, 066004, China and Institute of Physics & Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100080, China
Y.Q. Wang Beijing Laboratory of Electron Microscopy, Institute of Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing, 100080, China
Li Min Wang Institute of Physics & Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100080, China
Yun Peng Gao Beifangmingjing Glass Co. Ltd., Qinhuangdao, 066004, China
R.J. Zhang College of Materials Science and Engineering, Yanshan University, Qinhuangdao, 066004, China
Zai Ji Zhan, Li Ling Sun, and Jun Zhang Institute of Physics & Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100080, China
Wen Kui Wang Institute of Physics & Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100080, China College of Materials Science and Engineering, Yanshan University, Qinhuangdao, 066004, China (Received 15 January 2002; accepted 10 May 2002)
The wear behavior of bulk Zr41Ti14Cu12.5Ni10Be22.5 metallic glasses has been studied using sliding wear tests and scanning electron microscopy in both as-prepared and annealed samples. It was found that the wear resistance of differently processed samples increases in the following order: crystallized state; as-prepared state; relaxed state. The thermal stability of worn samples was also investigated by means of differential scanning calorimetry. Under the experiment conditions, no sliding wear-induced crystallization is observed in either as-prepared or relaxed samples indicating good thermal stability of the bulk metallic glasses. Metallic glasses possess some unusual mechanical properties such as good resistance to corrosion, high strength, and high hardness. In view of their high hardness and strength, metallic glasses are promising materials for engineering applications. Several studies have been conducted on the wear behavior of rapidly quenched ribbons.1,2 The results, however, are controversial: some metallic glasses showed high wear resistance, better than their crystallized counterparts;3,4 some exhibited wear performance well below expectation.5–10 The reason for these discrepancies is still unclear, although some researchers demonstrated that an amorphous alloy containing a homogeneous dispersion of intermetallic compounds exhibited the best wear performance and the fully amorphous
a)
Address all correspondence to this author. J. Mater. Res., Vol. 17, No. 8, Aug 2002
http://journals.cambridge.org
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materials exhibited the highest wear rate.11 Actually, the application area for metallic glasses in the ribbon shape is very limited. Recently, a number of bulk metallic glasses (BMGs) with critical cooling rates for glass forming less than 10 K/s have been discovered in many multicomponent alloy s
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