摘要
Investigations were made on the phase evolution and thermal stability of the 90W 7Ni 3Fe(mass fraction, %) milled powders by means of XRD and DTA. The results showed that ball milling produced an ultrafine composite powder consisting of supersolidus solution W(Ni, Fe) and amorphous phase, owing to the fast diffusion rate induced by high density of lattice defects and nanograin boundaries. The amorphous phase results from the extension of the solubility of W in γ (Ni, Fe) phase which forms during the first 3 h of ball milling.
Investigations were made on the phase evolution and thermal stability of the 90W-7Ni-3Fe(mass fraction, %) milled powders by means of XRD and DTA. The results showed that ball milling produced an ultrafine composite powder consisting of supersolidus solution W(Ni, Fe) and amorphous phase, owing to the fast diffusion rate induced by high density of lattice defects and nanograin boundaries. The amorphous phase results from the extension of the solubility of W in gamma-(Ni, Fe) phase which forms during the first 3 h of ball milling.
出处
《中国有色金属学会会刊：英文版》
CSCD
2000年第1期57-59,共3页
Transactions of Nonferrous Metals Society of China
