LASER POWDER DEPOSITION OF ALMGB_(14)-TIB_2 ULTRA-HARD COATINGS ON TITANIUM, AND STEEL SUBSTRATES

摘要

BAM is an ultra-hard ceramic compound created, at Ames Laboratory in 1999, by combining Aluminum Magnesium Boride (AlMgB_(14)) and Titanium Diboride (TiB_2). The high hardness, low coefficient of friction, and relative high temperature chemical inertness of BAM make it an ideal material for wear resistant coatings. Current BAM coatings are produced by Physical Vapor Deposition (PVD) or magnetron sputtering and are capable of only thin films. Using LASER Powder Deposition (LPD), high hardness (1300 HV) BAM coatings of 1 mm thickness, with increased fracture toughness were produced on Ti-6A1-4V and mild steel substrates. Initial testing has demonstrated LASER Powder Deposition to be a capable means of manufacturing large, highly wear resistant surfaces.