Characteristics of High Energy Milled W-Ni-Fe Nanocomposite Powders

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作者：
Fan, Jinglian
Huang, Baiyun
Qu, Xuanhui
Zhao, Muyue
机构：
[1] Central South University, Changsha 410083, China
[2] State Key Lab. for Powder Metallurgy, Central South University, Changsha 410083, China
来源：
| 2001年 / Northwest Institute for Nonferrous Metal Research卷 / 30期
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摘要：
Systematic investigations were carried out on the structural change, surfacial characteristic and thermal stability of the 90W-7Ni-3Fe(mass%) high energy milled powders using a combination of X-ray powder diffraction, brunauer-emmett-teller(BET)nitrogen adsorption technique and differential thermal analysis assited by DTA. The experimental results show that ball-milling could produce an ultrafine composite powders in which large lattice distortion, supersolidus solution, amorphous phase and solubility extension of W in γ phase were occurred due to the fast diffusion induced by high density of lattice defects and nanograin boundaries. BET results provide a further evidence that milling led the specific surface area of powders, surface of meso pore, pore size to decrease and micro pores to produce.
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