Plasma Spray Coating - Principles and Applications英文资料.pdf

Plasma- Spray Coating
by. Robert B. Heimann
Copyright Q VCH Verlagsgesellschaft mbH. 1996
1 Introduction
Thermal spraying has emerged as an important tool of increasingly sophisticated
surface engineering technology. Research and development are increasing rapidly,
and many applications are mercialized. An indication of this rapid devel-
opment is the fact that over 80% of the advances made over the last 90 years were
made in the last two decades, a corollary to Pareto’s 80/20 rule! [l] Many exciting
niches are opening up for metallic and ceramic surface coatings that include such
well established markets as aerospace and consumer industries but also more slowly
developing coating markets in the automotive, computer and munications
industries.
The goal of this text is to give students and researchers in materials engineering
and materials science an appreciation of the fundamental physical processes govern-
ing plasma spray technology, to provide familiarization with advantages and dis-
advantages of the pared to other surface coating techniques, to dis-
cuss basic equipment requirements and limitations, to present case studies and
typical applications of plasma spray technology to solve industrial problems, and to
lay a foundation for future research and development work in this field.
The material covered will discuss the basic nature of the plasma state, plasma-
particle interactions, heat and momentum transfer, particle-substrate interactions,
analyses of the microstructure, adhesion strength and residual stresses of coatings,
optimization of coatings by SDE (statistical design of experiments) and SPC (stat-
istical process control) methods, modeling of the plasma spray process, and an
account of a novel fractal approach to coating properties, and other nonlinear
considerations. The fundamental physical processes underlying plasma spraying
have been treated in detail. It was felt that many other texts