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Your search keyword '"Gong, Manfeng"' showing total 2 results
Start Over Author "Gong, Manfeng" Topic coating
2 results on '"Gong, Manfeng"'

1. INTERFACE SHEAR STRESS ANALYSIS AND INTERFACE SHEAR STRENGTH MEASUREMENT OF YTTRIA-STABILIZED-ZIRCONIA COATINGS

Author

GONG ManFeng, QIAO ShengRu, and MEI Fang

Subjects
Coating, Interface, Stress, Tension, Strength, Mechanical engineering and machinery, TJ1-1570, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

The application performance of coatings are depended on their interface bonded condition when coatings are bonded with substrate,and the interface stresses of coatings directly influences on their strength properties. The equations about interface shear stress of coatings,which based on a model of interface restriction and uniformity strain theory,were deduced.These equations could be used to determine the interface shear strength of coatings. The accuracy of theory analysis and the effectiveness of testing method were further verified by experiment. The interface shear strength of yttria stabilized zirconia coatings was measured by a new tensile method. The coatings were discriminatively sprayed on three parts on specimens with different thickness,and which contributed to analyzing the relationship between coatings’ thickness and their strength properties.

Published
2015
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2. Sliding wear behavior of TiAlN and AlCrN coatings on a unique cemented carbide substrate

Author

Chen Jian, Xin Deng, Gong Manfeng, and Shanghua Wu

Subjects
Materials science, 020502 materials, Metallurgy, 02 engineering and technology, Substrate (printing), engineering.material, Microstructure, Carbide, Cathodic protection, Reciprocating motion, 020303 mechanical engineering & transports, 0205 materials engineering, 0203 mechanical engineering, Coating, Physical vapor deposition, Cemented carbide, engineering
Abstract

PVD coating is a critical technique to improve the wear resistance and cutting performance of softer carbide substrates. The wear performance of the coating is closely related to the carbide substrate grade, coating parameters, and the coating materials. In this study, a unique carbide grade, 91WC-2TiC-3Co-3Ni-1Mo, has been developed specifically for PVD coating. Two different coatings i.e. TiAlN and AlCrN were successfully deposited with cathodic arc evaporation (CAE) technique on this carbide grade. The microstructure analysis shows good bonding between coating and carbide substrate. The comprehensive sliding wear testing, including reciprocating sliding, ball-on-disc, and micro-scratch testing, has been made to these two coatings. AlCrN coating shows consistently lower coefficient of friction (COF) compared with TiAlN coating in both reciprocating sliding test and ball-on-disc test. In addition, AlCrN coating has consistently higher normal critical loads than TiAlN coating during micro-scratch testing, demonstrating better bonding condition between coating and carbide substrate.

Published
2017
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