材料期刊网

SYNTHESIS OF TiN BY MICROWAVE CARBOTHERMAL REDUCTION OF TiO_2

B.H Liu , Y Zhang , S.X. Ouyang , and H.C. Gu (Research Institute of Technical Chemical Physics , East China University of Science and Technology , Shanghai 200237 , China)(Department of Materials Physics , University of Science and Technology Beijing , Beijing 100083 , China)(State Key Laboratory for Synthesis and Processing of Advanced Materials , Wuhan University of Technology , Wuhan 430070 , China)

金属学报(英文版)

Titanium nitride powder was synthesized by microwave carbothermal reduction of titanium oxide. The mechanism and thermal dynamics of the reaction process were studied. The results show that the microwave carbothermal reduction technology has unique advantages over the conventional reduction methods. It can not only lower the reaction temperature, shorten the synthesis cycle, but also refine the product particles,as well as improving the reactivity of the powder.

关键词: TiN microwave , null

FRACTAL SIMULATION OF AMORPHOUS ELECTROLESS NiP DEPOSITION

K. S. Guan , L. Zhang , Y. G. Yao and M. H. Zhang 1) Research Insititute of Chemical Equipment , East China University of Science and Technology , Shanghai 200237 , China 2) Department of Information and Control , Weihai Branch School , Harbin University of Technology , Weihai 264209 , China 3) Laiyang Agricultural College , Laiyang 265200 , China

金属学报(英文版)

Electroless NiP coating has stochastic nonlinear structure, which was in far from equilibrium and instability state. Fractal theory, an effective method for resolving nonlinear system, was introduced to describe the coating structure quantitatively. Disorker and self-similarity characteristics, which are the two basic features of fractal, were explained in this paper for the first time. The results show that amorphous NiP structure exhibits scale invariance and can be quantitatively characterized by fractal dimension. Based on the fractal principle, a two-dimensional computer simulation on electroless NiP deposition was carried out and it is in agreement with the experimental result. Finally, the fractal dynamics and process of atom growth were investigated. The results show that the atom deposition is reaction-limited growth process.

关键词: fractal , null , null

University of Science and Technology Beijing

JIA Shizhen University of Science and Technology Beijing , China.

材料科学技术（英文）

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A DAMAGE MODEL OF LIFE PREDICTION UNDERCREEPFATIGUE INTERACTION

Author N. Wang , B.S. Zhou , Z.D. Wang and D.D. Wu College of Mechanical Engineering , East China University of Science and Technology , Shanghai 200237 , ChinaManuscript received 18 October 1998

金属学报(英文版)

Based on the fundamental definition of damage and inelastic strain energy hypothesis, this paper presents an inelastic strain energy damage model under creepfatigue interaction condition, with the damage constitutional equations and life prediction formulae respectively described by strain and stress. Creepfatigue tests with notchedbar specimens were carried out at 550. The actual creepfatigue lives are in good agreement to the predicted lives according to inelastic strain energy damage model.

关键词: damage mechanics , null , null , null

Recent Advances of Laser Coating Technology in China

LIANG Yong LI Ruiguo Institute of Metal Research , Academia Sinica , Shenyang 110015 , ChinaInstitute of Corrosion and Protection of Metals , Aademia Sinica , Shenyang , 110015 , China

材料科学技术（英文）

Recent advances in laser coating technology including laser cladding,laser surface alloying and laser vapour deposition in China are reviewed in this paper.

关键词: laser , null , null , null , null

CORRELATION BETWEEN STRESS COMPONENTS AND STRESS CORROSION CRACKS IN BRASS Lecturer,Department of Materials Physics,University of Science and Technology Beijing,Beijing 100083,China

QIAO Lijie LIU Rui XIAO Jimei University of Science and Technology Beijing , Beijing , China

金属学报(英文版)

The effects of stress components on nucleation sites and propagation directions of stress cor- rosion cracks in brass were investigated with specimens under mode Ⅱ and mode Ⅲ loadings. The results indicated that under mode Ⅱ loading,stress corrosion cracks nucleated on the site with maximum normal stress component and propagated along the plane perpendieular to the maximum normal stress,under mode Ⅲ loading,the stress corrosion crack was not evident on the 45°plane due to the general corrosion in aqueous solution with high NH_4OH concentra- tion,while stress corroded in aqueous solution with low NH_4OH concentration, numerous cracks with spacings of 10—150μm were found on the 45°plane with maximum normal stress and no stress corrosion cracks was observed on the plane with maximum shear stress.

关键词: stress corrosion cracking , null , null , null

Bibliography of Science and Technology of Rare EarthsPublished in China (2001)

稀土学报(英文版)

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Bibliography of Science and Technology of Rare EarthsPublished in China (2001)

稀土学报(英文版)

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Bibliography of Science and Technology of Rare EarthsPublished in China (2001)

稀土学报(英文版)

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Bibliography of Science and Technology of Rare EarthsPublished in China (2001)

稀土学报(英文版)

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