1. National Engineering and Technological Research Center for Non-Ferrous Metals Composites, General Research Institute for Non-ferrous Metals, Beijing 100088, China 2. Beijing COMPO Advanced Technology Co., Ltd., Beijing 101400, China
Abstract：Fine droplets of Al-11Si, Al-22Si, Al-27Si and Al-50Si (mass percent) were produced using supersonic high-pressure gas atomization. The particle size of powders was carried out by using an ASTM standard sieve with a vibratory shaker. Scanning electron microscopy (SEM), optical microscopy (OM) and X-ray diffraction (XRD) were used to the hierarchy of different microstructure. The [D50] (particle size on average) of Al-Si alloy powder is 57 μm, and the geometric standard deviation [δ] is less than or equal to 1.38, which is much lower than conventional gas atomization powder. The morphology of Al-Si powder is spherical or ellipsoidal sphere. There are fine particles adhered to the larger particles. The smooth finish of particles becomes worse with increase of Si content. Dendrite Al, eutectic and primary Si have been observed in the powders. The primary Si content increases and changes from particle to slice with the increase of Si content. The powder particle size has an effect on phase content, and the eutectic phase content increases with the decrease of particle size when the Si content is more than 11wt%.
收稿日期: 2014-02-24
出版日期: 2014-10-16
通讯作者:
赵新明
E-mail: xinming_zhao@126.com
引用本文:
付军华， 张少明， 徐 骏 ， 赵新明 ， 盛艳伟 . Si含量对超音速气雾化Al-Si合金粉末性能的影响[J]. , 2014, 24(05): 12-18.
FU Jun-hua, ZHANG Shao-ming, XU Jun,, ZHAO Xin-ming, , SHENG Yan-wei,. Effects of Si content on properties of Al-Si alloy powders produced by supersonic gas atomization. , 2014, 24(05): 12-18.
2014, Vol. 24 
