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THE SYNTHESIS AND MAGNETOSTRICTION OF P rx Ce 1 x Fe 2 COMPOUNDS

Y.X.Li , G.Z.Xu , J.P.Qu , F.G.Liu and B.W.Wang Hebei University of Technology , Tianjin 300130 , China C.C.Tang.G.H.Wu and W.S.Zhan State Key Laboratory for Magnetism , Institute of Physics , CAS , Beijing 100080 , China C.Zhao Tianjin University , Tianjin 300072 , China S.X.Gao Hebei Normal University , Shijiazhuang 050091 , China

金属学报(英文版)

The synthesis and magnetic properties of Pr xCe 1 x Fe 2 have been investigated. The forma tion of Pr xCe 1 x Fe 2 is found to depend strongly on annealing temperature. Pure single phase compound can be synthesized at ambient pressure when x≤0 5. The main phase of the Laves structure can still be observed up to x=0 8. Magnetostriction increases with in creasing x and a largest saturation magnetostriction 200 ppm is observed for x=0.5.

关键词: magnetostriction , null , null

APPLICATION OF UNIFORM PRECRIPTION DESIGN IN STUDYING OF WEARREISTANT COATING IN PLASMA SPRAYING

S.C. Fan 1) , X.H. Wang 2) , J.J. Zhang 2) and J.M. Wan 2) 1)School of Mechanical Engineering , Tianjin University , Tianjin 300070 , China 2)School of Mechanical Engineering , Hebei University of Technology , Tianjin 300130 , China

金属学报(英文版)

Plasma spraying technics, a method of strengthening surfaces, shows advantages in wear-resistant, reducing friction, bearing corrosion and enduring higher temperature. While for the coating material, it is important to improve the ability of the functional coating. In this paper, a coating material of wear-resistant, bearing corrosion and enduring higher temperature in middle and low speed diesel is studied quantificationally with a uniform prescription design method, which reduced the test period as the test points distribute uniformly. An optimized combination is put forward of each part in the coating and a method to develop a new coating material is supplied.

关键词: coating , null , null , null

THERMALLY CYCLING AND MIXED GAS CARBONIZING

R.X.Wang , J.X.Zhang , C.X.Cui and N.J.Gu Hebei University of Technology , Tianjin 300130 , China

金属学报(英文版)

This paper introduces a new approach to metal surface hardening. By utilizing thermally cycling and mixed agents to speed up diffusion of diffusing elements, the carbonizing rate is greatly enhanced and the structure of the strengthened case is more satisfactory, thus obtaining much longer services of machine parts. The mechanism of the new approach is discussed.

关键词: carbonizing , null , null , null

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