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| Abstract No.: |
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Scheduled at:
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Wednesday, May 05, 2010, Sophia Room 2:20 PM
Wear Protection 3
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| Title: |
Preparation and characterization of plasma sprayed NiAl-hBN composite coating
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| Authors: |
Lingzhong Du* / Institute of Process Engineering, Chinese Academy of Sciences, China
Weigang Zhang / Institute of Process Engineering, Chinese Academy of Sciences, China
Wei Liu/ Institute of Process Engineering, Chinese Academy of Sciences, China
Jingmin Zhang/ China Iron & Steel Research Institute Group, China
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| Abstract: |
NiAl-hBN composite powders were manufactured by spray drying technology and plasma sprayed to form coatings. The effect of hBN addition amount on the flowability and apparent density of the composite powders, as well as the mechanical properties of the as-sprayed coating including bond strength, hardness, friction coefficient and worn weight rate were evaluated. The results indicate that both the flowability and apparent density of the NiAl-hBN powder and bond strength and microhardness of the coatings decrease significantly with the amount of hBN content. Addition of hBN was beneficial to decrease the friction coefficient and wear rate of the as-sprayed coating, however, hBN amount above 10% will deteriorate the wear resistance of the coating. The NiAl-hBN coating containing 5~10%hBN shows the optimum properties combined strength, hardness and wear resistance with lubricating effect.
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