Liang FANG
,
Feng XIAO
,
Zushu LI
,
Zainan TAO
材料科学技术（英）
The density of Ni-Al alloys in both liquid state and solid-liquid coexistence state was measured with a modified pycnometric method. It was found that the density of Ni-Al alloys decreases with increasing temperature and Al concentration in the alloys. The molar volume of liquid Ni-Al binary alloys increases with the increase of temperature and Al concentration. The partial molar volume of Al in Ni-Al binary alloy was calculated approximately. The molar volume of liquid Ni-Al alloy determined in the present work shows a negative deviation from the ideal linear molar volume.
关键词:
Ni-Al alloy
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Shuhua LIANG
,
Xianhui WANG
,
Liang FANG
,
Zhikang FAN
金属学报(英文版)
doi:10.1016/S1006-7191(08)60073-3
Since Cu-Al powder characteristics have important effects on the preparation of Cu/Al2O3 composite, the apparent activation energy of Al internal oxidation reaction in Cu-Al pre-alloyed powders with different characteristics was calculated in the present investigation. The microstructure and properties of the synthesized Cu/Al2O3 were studied. The results show that high-energy milling can obviously promote internal oxidation of Al in Cu-Al powders in the same solid solubility. At the same milling conditions and internal oxidation parameters, the solid solution of Al in Cu either in low or high amount will result in the poor microstructure and properties of the Cu/Al2O3 composite. Subsequently, when high-energy milling and internal oxidation are synchronously used to prepare the Cu/Al2O3 composite, there should be an appropriate solubility and milling effect for the pre-alloyed powders.
关键词:
characteristic
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