STRUCTURE AND PROPERTIES OF RE-Ni-B-Al_2O_3 COATING MATERIAL

Abstract

Abstract: The effects of heat treatment temperature on the hardness, wear resistance and structure of a coating material consisting of Ni-0.45wt% RE4.8wt% B-6.2wt% Al2O3 have been discussed. The results showed that the hachess and wear resistance of the composite material reach the optimal values when heating temperature rises to 350℃ and 500℃ respectivelg. X-ray diffraction and scanning electron microscopy indicate that the composite material is amorphous in the as-coating state. The crystallized temperature of Ni-B alloy is increased when RE and Al2O3 particles are inserted. The hardness and wear resistance of the composite are raised obviously with addition of RE and Al2O3 particles.

Key words: RE-Ni-B-Al_2O_3 composite material, amorphous, structure

Z.C Guo;X.W Yang, H.K Lin, Z.Y Wang and M. Wang(Department of Metallurgy, Kunming University of Science and Technology Kunming 650093, China). STRUCTURE AND PROPERTIES OF RE-Ni-B-Al_2O_3 COATING MATERIAL[J]. Acta Metallurgica Sinica (English Letters), 1997, 10(1): 56-60.

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STRUCTURE AND PROPERTIES OF RE-Ni-B-Al_2O_3 COATING MATERIAL

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