Two different processes (i) alloying followed by selective leaching of alloying constituent and (ii) controlled chemical attack of oversize powder stock were studied in some detail to assess their suitability for meta...Two different processes (i) alloying followed by selective leaching of alloying constituent and (ii) controlled chemical attack of oversize powder stock were studied in some detail to assess their suitability for metal powder production. In a typical series of experiments on the alloying process, titanium, zirconium and nickel were alloyed with aluminium. The sample was then leached out with acid to yield the metals in powder form. The metal powders generally had a particle size spread in the range of <5 μm. The acid concentration and contact time were varied and both have influences on particle size of the final product. In the second process involving chemical attack of coarse powder, it is shown by taking the example of nickel that a range of particle size could be generated through close control of acid concentration and contact time.展开更多
文摘Two different processes (i) alloying followed by selective leaching of alloying constituent and (ii) controlled chemical attack of oversize powder stock were studied in some detail to assess their suitability for metal powder production. In a typical series of experiments on the alloying process, titanium, zirconium and nickel were alloyed with aluminium. The sample was then leached out with acid to yield the metals in powder form. The metal powders generally had a particle size spread in the range of <5 μm. The acid concentration and contact time were varied and both have influences on particle size of the final product. In the second process involving chemical attack of coarse powder, it is shown by taking the example of nickel that a range of particle size could be generated through close control of acid concentration and contact time.
