13-06-2019 дата публикации
Номер: US20190177826A1
Systems and methods in accordance with embodiments of the invention implement copper-based materials in applications where resistance to wear is desired. In one embodiment, a wear-resistant gear includes a gear defined by a rotatable body having teeth disposed on an outer surface of the rotatable body, where the gear body is formed at least in part from a material including copper and X, where X is one of zirconium, titanium, hafnium, rutherfordium, and mixtures thereof and where the atomic ratio of copper to X is approximately between 2:3 and 3:2. 1. A method for increasing the wear-resistance of a mechanical component comprising: [{'sup': '1/2', 'wherein at least an outer surface of the mechanical component is formed from a material having a fracture toughness of less than 80 MPa·m, a hardness of less than 450 Vickers and comprising CuZrXZ and optionally Z,'}, 'wherein X is at least one of Al and Be,', 'wherein Z is one of: Y, Nb, Ti, Cr, Fe, Co, Ni, Zn, B, C, Si, P, Mo, Pd, Ag, Sn, Sb, Hf, Ta, W, Pt, Au, and mixtures thereof,', 'wherein the atomic % of Cu is at least 39.77,', 'wherein the atomic % of Al, where present, is between approximately 3% and 10%,', 'wherein the atomic % of Be, where present, is between approximately 3% and 10%, and', 'wherein the atomic ratio of Cu to Zr is approximately between 2:3 and 3:2;, 'forming a mechanical component having at least one outer surface configured to engage with a mated component and subject to a wear-causing process;'}preparing the mechanical component such that a at least one outer surface has surface irregularities sufficiently small to prevent wear of greater than 15 μm in a single wear cycle; andconfiguring the mechanical component such that the wear-causing process from the mated component imparts a wear stress on the at least one outer surface of less than 5 MPa such that oxidation of the outer surface of the component is inhibited during operation of the wear-causing process.2. The method of claim 1 , wherein ...
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