Novel W-based metallic glass with high hardness and wear resistance

An attempt has been made to develop a new metallic glass (MG) that combines high hardness with wear resistance. Refractory metallic films of W33Ni32B35 (at.%) have been deposited on stainless steel and Si substrates by dc magnetron sputtering. The alloy films are glassy, have a high crystallization...

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Bibliographic Details
Published in:Intermetallics 2014-04, Vol.47, p.6-10
Main Authors: Madge, S.V., Caron, A., Gralla, R., Wilde, G., Mishra, S.K.
Format: Article
Language:English
Subjects:
Amorphous materials
B. Alloy design
B. Glasses, metallic
B. Mechanical properties at ambient temperature
B. Tribological properties
C. Coatings, intermetallic and otherwise
C. Thin films
Direct current
Elastic modulus
Glassy
Hardness
Magnetron sputtering
Metallic glasses
Wear resistance
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Summary:An attempt has been made to develop a new metallic glass (MG) that combines high hardness with wear resistance. Refractory metallic films of W33Ni32B35 (at.%) have been deposited on stainless steel and Si substrates by dc magnetron sputtering. The alloy films are glassy, have a high crystallization temperature of 873 °C and rank among the very hard metallic materials (∼24 GPa). Importantly, this MG also shows excellent wear resistance, approaching that of standard tribological materials like TiN and hence it represents one of the most wear-resistant known metallic materials. Based on its unique combination of high strength and low elastic modulus, other potential applications are also discussed. •A new, refractory W–Ni–B metallic glass is developed.•Exceptionally wear-resistant alloy.•Very high resilience, suggesting applications in MEMS.•Much cheaper than other W-based metallic glasses.
ISSN:0966-9795
DOI:10.1016/j.intermet.2013.12.003