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Bonding of Metallic Glass to Crystalline Metal.
U S Patent 1986 Feb;(4):
A method of bonding a first thin crystalline metal to a second thin metal such as metallic glass is disclosed. Initially, the metallic glass is coated with a thin thermal barrier layer. Next, the first metal is heated to a temperature sufficient for diffusion bonding. Finally, the metallic glass is maintained at ambient temperature as the metallic glass is diffusion bonded to the crystalline metal. The thermal barrier layer prevents the metallic glass from reaching a phase transition temperature during the diffusion bonding. Consequently, a composite product having a base layer of crystalline metal and an outer layer of metallic glass is produced. Preferably, the diffusion bonding is produced by evacuated roll-bonding and the coating is attached to the metallic glass by electroplating. A plurality of metallic glass layers and crystalline metal layers can be bonded together to produce a sandwiched composite product. Thus a commercial metallic glass ribbon containing 80 atomic percent iron and 20 atomic percent boron was lightly sanded, cleaned in an ultrasonic bath, rinsed with water and alcohol, and air dried. It was nickel plated in a bath containing 608 g/l niso4.7H2o, 69 g/l nicl2.6H2o and 35 g/l h3bo3 at 65 deg-85 deg c and a current density of 0.061 A/cm2. Type 1020 steel samples were cleaned and heated to 1,150 deg-1,200 deg c and roll bonded to the plated metallic glass strip, initially at approximately 45 deg c, under vacuum of approximately 3x10-5 torr to produce well bonded composites.
Issue of Publication
U.S. Patent No. 4,568,014, Feb. 4, 1986; Chem. Abstr. Not Found
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division