EVALUATIONS OF INTERFACE BOND STRENGTH BETWEEN THERMAL SPRAYED COATINGS AND SUBSTRATS

Acta Metallurgica Sinica (English Letters) ›› 1999, Vol. 12 ›› Issue (5): 983-987.

• Research paper • Previous Articles Next Articles

EVALUATIONS OF INTERFACE BOND STRENGTH BETWEEN THERMAL SPRAYED COATINGS AND SUBSTRATS

L.Li 1) ,Z. P.Wang. 2) ,Z.K.Qu 1) ,D.M.Jia 3) and Z.Jiang 4) 1) Mechanical Engineering College, Shenyang University, Shengyang 110044, China 2) Harbin Research Institute of Welding, Harbin 150080, China 3) Information Engineering Collage, Shenyang University, Shengyang 110044, China 4) Materials Engineering College, University of Science and Technology Beijing, Beijing 100083, China

Received:1999-10-25 Revised:1999-10-25 Online:1999-10-25 Published:2009-10-10

Abstract

Abstract: A novel test method of measuring the interface bond strength between a thermal sprayed coating and substrate is put forward first in this paper. The test method is simple and reliable, and exists no any inherent shortcoming and controversy. The interface bond strength obtained by the test method is completely the inherent property of the interface and depends only on coating material properties, spray conditions, and technique of depositing the coating. By extensive tests, it is shown that the test tesults are very tepeatable and reliable. Furthermore, from this test, the critical coating thickness under which the coating spall can not emerge is also obtained.

Key words: coating, interface bond strength, stress, strain

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EVALUATIONS OF INTERFACE BOND STRENGTH BETWEEN THERMAL SPRAYED COATINGS AND SUBSTRATS

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