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Assignees501 Glyco-Metall-Werke Daelen, Loos & Co., Inc.
InventorsErich Hodes, Ulrich Engel, Heiko Gruner
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Leakproof, adhesive, non-lamellar and pore-free antifriction coatings can be produced from essentially oxidation-sensitive dispersion alloys, with at least two metallic alloy components forming a miscibility gap in the solid state, by means of vacuum plasma-spraying with a practically homogeneous material distribution. Precipitation crystallites of alloy components are significantly below 5 .mu.m and fringe-crystal growth is definitely inhibited. By adding hard particles during the coating process further dispersion consolidation can be achieved. Such antifriction coatings improve longevity, corrosion resistance and emergency lubrication of sliding surfaces without reducing their running-in characteristics and their ability to bed in foreign matter. They can be deposited individually on to sliding bearing components or continuously on to supporting strips.
Bearing metal layer applied by vacuum plasma spraying to a support member directly or over an interlayer, comprising a dispersion alloy having at least two metallic components in a mixture leading to miscibility gaps, selected from the group consisting of aluminum-lead, aluminum-tin, and copper-lead dispersion alloys, said components, in the region of the miscibility gaps, forming a homogeneous alloy layer substantially free from pores, lamellae and stalk crystals, having uniformly dispersed fine particles comprising precipitation crystallites of one of said metallic components of a size substantially less than 5 microns and having a porosity of about 0% to 1%.
Method of producing a bearing metal layer on a support member, comprising spraying by vacuum plasma discharge a dispersion alloy having at least two metallic components in a mixture leading to miscibility gaps, selected from the group consisting of aluminum-lead, aluminum-tin, and copper-lead dispersion alloys, introducing the alloy component into the plasma jet in powdered form, fusing the particles of powder and forming a homogeneous melt of said dispersion alloy in the plasma jet, and quenching the fused alloyed particles on the surface of the support member to form a homogeneous alloy layer substantially free of pores, lamellae and stalk crystals, having uniformly disposed fine particles comprising precipitation crystallites of one of said metallic components of a size substantially less than 5 microns and having a porosity of about 0% to 1%.
Dependencies are inferred from the claim text.