SURFACE MODIFICATION AND PROCESSING OF MATERIALS.

J. Narayan, R. Singh, K. Jagannadham

Research output: Contribution to conferencePaperpeer-review

Abstract

Two topical areas in the application of non-equilibrium techniques in materials processing are considered: (i) Mixing of metal overlayers with ceramics using laser, ion beams and rapid thermal annealing and (ii) Laser deposition of superconducting thin films. Mixing induced by both ruby and excimer (krypton flouride) lasers in metal-ceramic systems has been studied. The nature of mixing and the microstructural changes induced in Ni/SiC system induced by Xe ion beam irradiation are examined. Enhanced mixing for this system was obtained with increasing substrate temperatures. Detailed heat-flow calculations are performed to simulate the interaction of lasers with metal coated ceramic structures. Thermodynamical calculations show an increased possibility of chemical reactions between the interfacial layers at higher temperatures.

Original languageEnglish
Pages33-61
Number of pages29
StatePublished - 1987
Externally publishedYes

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