摘要:

AbstractSignificant progress has been made in the study of contact mechanics of engineering surfaces, particularly layered surfaces, in the past decade. This mainly involves the removal of the assumptions in the Hertztheory. The application of numerical techniques including the integral transform and finite element methods has successfully solved many contact problems which are difficult with analytical solutions. The present paper reviews the recent developments in contactmechanics of engineering surfaces, with emphasis on the layered surfaces where a coating or several coatings with varying mechanical properties are produced on top of the substrate by means of surface engineering. The developments in non-layered contact theories are first briefly discussed, followed by detailed discussion of the layered surface contact theories which have been developed on this basis. Finally, further work which is needed in the near future concerning layered surface contacts is proposed.

ISSN:0267-0844    

DOI:10.1179/sur.1994.10.4.297

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

AbstractThe feasibility of plasma spray deposition of polyamide 11 on steel has been investigated. The conditions for he preparation of high integrity deposits have been established by the control of precursor powder injection,torch traverse speed, and arc power. The optimal deposition conditions are designed to produce complete particle melting in the plasma, extensive flow on impact, and minimal thermal degradation. The study of the deposited layers revealed a significant loss incrystallinity and the presence of a minor metastable phase as a result of rapid solidification. Under nonoptimal deposition, substantial thermal degradation occurred for which a chain scission mechanism is proposed. No oxidation of the polymer was detected even though spraying was carried out in air.

ISSN:0267-0844    

DOI:10.1179/sur.1994.10.4.307

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor