ISSN:0267-0844    

DOI:10.1179/sur.1996.12.2.89

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

ISSN:0267-0844    

DOI:10.1179/sur.1996.12.2.91

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

ISSN:0267-0844    

DOI:10.1179/sur.1996.12.2.94

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

AbstractThis event, organised every 4 years since 1984 by the Surface Engineering Group in the University of Northumbria at Newcastle, has become a well recognised feature in the surface engineering conference cycle. HANSHAN DONG of the School of Metallurgy and Materials Science, University of Birmingham picks out some of the highlights, noting particular interest in intermetallics, rare earths, and magnetron sputtering.

ISSN:0267-0844    

DOI:10.1179/sur.1996.12.2.130

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

ISSN:0267-0844    

DOI:10.1179/sur.1996.12.2.132

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

ISSN:0267-0844    

DOI:10.1179/sur.1996.12.2.133

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

ISSN:0267-0844    

DOI:10.1179/sur.1996.12.2.135

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

AbstractSurface engineering of steels has been carried out using plasma inlmersion ion implantation (PI3) and related innovative techniques including plasma immersion ion beam enhanced deposition (PIIBED) of titanium and plasma immersion ion beam mixing (PIIBM) of nitrogen and titanium. Auger concentration profiles indicate that PI3of nitrogen produces a smooth implantation profile in the surface layer of the steel. The formation of a thin layer of TiN on the surface of the specimens treated by PIIBED of titanium and by PIIBM of nitrogen and titanium was confirmed by X-ray photoelectron spectroscopy. It has been demonstrated that the surface hardness and wear resistance of all the treated specimens were greatly improved.

ISSN:0267-0844    

DOI:10.1179/sur.1996.12.2.137

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

AbstractThe properties of thin films are functions of film structure and hence of production route. The structure of thin films consists of macro- and microscale features such as grains, together with pits, cracks, and inclusions, all of which are characterised by their spatial distribution, size, and shape. Some basic definitions and methods that can be used to characterise quantitatively the microstructures of thin films are presented. Examples are given for TiN films produced by plasma assisted chemical vapour deposition and physical vapour deposition.

ISSN:0267-0844    

DOI:10.1179/sur.1996.12.2.142

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor

摘要:

AbstractPlaslna nitriding of steels has been intensively investigated and has found many applications in several industrial sectors owing to the excellent combination of properties obtained, i.e. good tribological performance and high fatigue strength. Although some preliminary research work has reported that rare earth elements can speed up most thermochemical treatments, little attention has been paid to the effect of these elements on the plasma assisted thermochemical processes. In the present investigation, plasma nitriding of 38CrMoAl steel has been carried out in order to investigate the effect of introducing rare earth elements on the process and on the structures and abrasive wear resistance of the resultant sUljace layers. Systematic characterisation of the surface layers has been perfonned elnploying optical and electron microscopy (morphology of worn surface), X-ray diffraction (phase identification), energy dispersive X-ray analysis (composition), and microhardness testing. Abrasive wear tests were also conducted using a wheel on wheel configuration with hard iron borides as an abrasive medium under different loads. The results showed that rare earth elements can effectively speed up the nitriding process, and this thicker nitrided case showed improved abrasive wear resistance. Based on the experimental results, the mechanism by which rare earth elements speed up the plasma nitriding process has been discussed in terms of sputtering induced defects (vacancies and dislocations), conjugation of rare earth species to these defects, and lattice distortions surrounding the rare earth atoms, which facilitate fast shortcircuit diffusion of nitrogen.

ISSN:0267-0844    

DOI:10.1179/sur.1996.12.2.147

出版商:Taylor&Francis    

年代:1996

数据来源: Taylor