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the eutectic degree of the microstructure; (3) RE_2O_3 could promote the nucleation of the reinforcement particles as heterogeneous nuclei. During the precipitating process of the carbide particles, some RE_2O_3 powders still existed while others react with carbon in the melt to form rare earth carbides. Both of them acted as heterogeneous nuclei for the formation of particles. Key words:laser......
;纳米复合粉末;La2O3;ZrC 中图分类号:TB332 文献标志码:A Preparation of La2O3-coated ZrC composite powder by heterogeneous precipitation-calcination process YUAN... of Technology, Zhuzhou 412008, China) Abstract: Using La(NO3)3·6H2O, liquid ammonia and ZrC as raw materials, La2O3-coated ZrC composite powder was prepared by the heterogeneous precipitation......
-stir-casting process could be prevented. In this paper, a uniform thin nano-film of CeO2, about 20 nm thick, was successfully prepared onto graphite powder surface by heterogeneous nucleation process......
; 包裹氧化铝; 复合材料; 金属镍 中图分类号: TB333 文献标识码: A Preparation of nickel-coated Al2O3 spherical micro-powders by heterogeneous precipitation-thermal reduction process LI Wang-xing1, 2, LIU Ye-xiang1 (1... heterogeneous precipitation method using nickel sulfate, ammonium bicarbonate solutions and spherical AACH powders as the major starting materials. The effects of the concentration of spherical AACH......
University, Changsha 410083, China) Abstract: Fe2(MoO4)3/Si3N4 was prepared by heterogeneous precipitation-thermal reduction method using α-Si3N4, Fe(NO3)3.9H2O and NH4Mo7O24.4H2O as raw material...; Mo5Si3; heterogeneous precipitation-thermal reduction Si3N4陶瓷具有密度低,高温强度高,高温蠕变小,导热系数低,热膨胀系数小,抗热震性能好,化学性能稳定,硬度高(莫氏硬度为9),耐高温磨损等优点,应用于航空航天发动机涡轮叶片等耐高温,耐磨损材料,但其存在脆性较大,韧性较差和抗冲击性差等缺点[1-3].目前,强韧化Si3N4多采用晶须和纤维增强增......
heterogeneous network to possible link failures. Linear algebra, graph theory and group theory are applied to construct one series of global encoding kernels which are applicable to all source rates... broadcast; heterogeneous network; code construction algorithm 1 Introduction Network coding theory was proposed in order to achieve the maximum capacity of network, which can hardly be realized......
Microstructure evolution and superelasticity behavior of Ti-Ni-Hf shape memory alloy composite with multi-scale and heterogeneous reinforcementsXiaoyang Yi,Bin Sun,Weihong Gao,Xianglong Meng,Zhiyong Gao,Wei Cai,Liancheng ZhaoSchool of Materials Science and Engineering, Harbin Institute of Technology摘 要:In the present study,the in-situ TiB whisker......
Efficient nanostructured heterogeneous catalysts by electrochemical etching of partially crystallized Fe-based metallic glass ribbonsQiaoyue Zhang1,Shun-Xing Liang1,2,Zhe Jia3,Weimin Wang5,Lai-Chang Zhang11. School of Engineering, Edith Cowan University2. Technical Chemistry I and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen3. School of Mechanical......
Berlin Heidelberg 2016 Abstract: Rubidium phosphate can be more conveniently obtained by extracting trace Rb+ from the salt lake brine. Rb3PO4 was found to be an excellent heterogeneous catalyst... in industrial application. Key words: rubidium phosphate; transfer hydrogenation; heterogeneous catalysis; cyclic transition state 1 Introduction Hydrogenation of carbonyl compounds, which......
Trans. Nonferrous Met. Soc. China 27(2017) 2291-2299 Nucleation/growth mechanism of electrocrystallization for As-Sb alloy in hydrochloric acid system Hua-zhen CAO, Yu-feng ZHANG, Qian-qian WANG... presented in dimensionless formation, which showed that the initial nucleation/growth process of As-Sb alloy followed three-dimensional nucleation model with diffusion- controlled growth. Relevant......