Select the alloy composition in order to ensure the formation of amorphous alloys have very low critical cooling rate

In the preparation of amorphous alloys, to select the alloy composition in order to ensure the formation of amorphous alloys have very low critical cooling rate, resulting in a high glass-forming ability. Main aspects of the preparation process of metal casting and water quenching method, the key is to control the rapid cooling and  abrasive grinding  nucleation. Because of amorphous alloy powder technology is relatively mature, so many years, the use of amorphous powder below its crystallization  Polycrystalline diamond  warm extrusion, warm rolling, impact (explosion) curing and isostatic sintering method to prepare large amorphous alloy block, but there is a lot of technical problems, such as the total is higher than the hardness of the amorphous powder static powder, and thus suppress the poor performance, and its overall  cubic boron nitride  and spin quenched amorphous ribbons prepared similar, it is difficult as a high-strength structural use of materials [39]. Visible with ordinary bulk amorphous materials prepared by powder metallurgy there are many technical problems.