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X-ray Diffraction Line Profile Broadening of Fe_(50)Pd_(50) Alloy Ultrafine Particles

Jian CHEN , Wenduo WEI , Mingchuan YANG , Xiukui SUN , Wenxiu CHEN and Zhuangqi HU (State Key Lab. of RSA , Institute of Metal Research , Chinese Academy Sciences , Shenyang , 110015 , China)

材料科学技术（英文）

The composition distribution in Fe50Pd50 alloy ultrafine particles prepared by inert gas condensation method was investigated in details by means of X-ray diffraction technique through deconvolution of the X-ray diffraction data. The microscopic composition distribution in the alloy UFP was identified, which is caused by nonuniformity of the melt, fractional distillation during the evaporation process and statistical fluctuation during nucleation and coalescence of the alloy particles. The composition distribution affects the properties of the alloy UFP

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Synthesis and Characterization of Mixed Al+AlN Nanoparticles

Xiangcheng SUN , Mingchuan YANG , Feng YE , Xiukui SUN and Wenduo WEI(State Key Lab. for RSA , Institute of Metal Research , Chinese Academy of Sciences , Shenyang 110015 , China)Yingda YU and Dehai PING(Lab. of Atomic Imaging of Solids , Institute of Metal Resea

材料科学技术（英文）

Mixed Al+AlN nanoparticles were synthesized by an active plasma-metal reaction method. Mean particle size of the mixed Al+AlN nanoparticles is about 30-50 nm. Defects were found in some AlN particles. Moreover, the AlN ratio and its particle size in mixed Al+AIN nanoparticles obtained in different atmospheres (N2+Ar) increase with increasing N2 particle pressure, and the specific sudece areas of the mixed Al+AlN nanoparticles increase with the AlN ratio. The surface degradation of the Al+AlN exposed to air is estimated by the infrared absorption spectra

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Size Distribution of Ti-Fe Nanoparticles

Feng YE , Mingchuan YANG , Xukui SUN and Wenduo WEI(State Key Lab. for RSA , Institute of Metal Research , Chinese Academy of Sciences , Shenyang 110015 , China)

材料科学技术（英文）

Ti-Fe nanoparticles with different concentrations were synthesized by gas condensation method.It is found that the size distribution of single phase nanoparticles obeys log normal distribution,and that of multiple phase nanoparticles is quite different. If it is assumed that the size distribution of each phase in multiple phase nanoparticles obeys log normal distribution as that of single phase particles. the calculated distribution curve is agreeable to the empirical curve. The inferences from the hypothesis are also supported by experimental results

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