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Effects of nano-AlN on phase transformation of low temperature vitrified bond during sintering process SHANG Yong(尚 勇)1, HOU Yong-gai(侯永改)1,2, QIAO Gui-ying(乔桂英)3, ZOU Wen-jun(邹文俊)2... studied. Furthermore, the phase transformation during sintering process was investigated by means of thermo-gravimetric analysis (TG), differential thermal analysis (DTA) and X-ray diffraction (XRD......
Macro-microscopic morphology and phase analysis of TiAl-based alloys sheet fabricated by EB-PVD method ZHANG De-ming(章德铭)1, CHEN Gui-qing(陈贵清)1, HAN Jie-cai(韩杰才)1, ZHANG Xing-hong(张幸红)1, YAO... was fabricated successfully by using electron beam-physical vapor deposition(EB-PVD) method. The microscopic morphology and phase composition of specimens in various states were analyzed by atomic......
coefficient of element i in liquid phase, and wl,i, wS,i and w0,i are the contents of element i of liquid, solid and average in mass fraction respectively. The dependence of the solidification temperature...%Si-1.58%Mg alloy obtained with different cooling rates: (a) 0.3 ℃/s; (b) 6.0 ℃/s; (c) 200 ℃/s 4 Analyses The diffusion coefficient of Si is slower than that of Mg in solid phase, but larger in liquid......
based alloy; Mg-6A1-1Zn-0.7Si alloy; Sb; solid solution-treatment; Mg2Si phase ... phase analysis, scanning electron microscopy (SEM) analysis, X-ray diffraction (XRD) analysis, and differential scanning calorimetry (DSC) analysis. The research results indicate that after being......
SEM image of AZ91D-Nd alloy and EDS results of surface scan by prepared by solid phase synthesis 2.3 透射电镜组织特征分析 图6所示为经5道次挤压后AZ91D-Nd合金TEM像.从图6(a)中可以看出,在晶界处分布着尺寸均匀,细小的Mg-Nd中间合金颗粒,形状上主要以球团状为主.这种作...能 Fig. 7 Mechanical properties of AZ91D-Nd alloy prepared by solid phase synthesis 由于挤压热和摩擦热的影响,Nd元素和Mg17Al12相会扩散到晶粒内部,产生固溶强化和析出强化[19].被充分破碎的中间合金颗粒和β-Mg17Al12相在挤出时作为第二相粒子存在,有效地阻碍了位错的移动和晶界的滑移,造成了......
] investigated the influence of MA on synthesizing of Laves phase NbCr2 by solid phase thermal reaction and found that MA technique not only provided an approach for obtaining milled powders with microcrystalline/nanocrystalline structure, but also resulted in the decrease of the solid phase reaction temperature from 1 200 ℃ for original elemental powders to 900 ℃ for 20 h ball milled powders. These provide......
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(liquid) phase, and 56.40% is in gas phase. The Na2O mass fraction difference between raw-material mixture and crucible appreciably impacts solid (liquid) phase diffusion amount, but there is nothing to do with gas phase diffusion. In addition, the enhancing of reducing atmosphere, increasing time and temperature, and the existence of Fe2O3, Al2O3 made more Na2O loss. Key words: bauxite; solid phase......
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J. Cent. South Univ. (2016) 23: 59-67 DOI: 10.1007/s11771-016-3049-5 Rapid and simultaneous determination of ten off-flavor compounds in water by headspace solid phase microextraction and gas... Berlin Heidelberg 2016 Abstract: A simple and sensitive analytical procedure for the determination of multi-component compounds in water samples was developed and optimized using the headspace solid-phase......
