Journal of Thermal Spray Technology

, Volume 28, Issue 3, pp 327–332 | Cite as

A Discussion on the Limits to Coating Reproducibility Based on Heat Transfer Instabilities

  • Robert B. HeimannEmail author
Peer Reviewed


During the past several decades, plasma spraying has emerged as an important rapid solidification technology, aimed to depositing protective and functional coating on a variety of substrates in sectors as diverse as aerospace, manufacturing, automotive, consumer, and biomedical industries. As these applications demand high-quality coatings with reproducible and reliable properties, stringent process control is mandatory, supported by sophisticated diagnostic equipment. However, owing to the highly nonlinear nature of the plasma spray process, non-deterministic coating property changes make these requirements difficult if not impossible to achieve. In this contribution, possible reasons for nonlinearity are discussed based on a stability theory formalism as described by a cusp catastrophe of codimension 2 (Riemann–Hugoniot catastrophe).


chaos theory coating properties cusp catastrophe heat transfer plasma spraying stability theory thermal plasma 


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Copyright information

© ASM International 2019

Authors and Affiliations

  1. 1.Department of MineralogyTU Bergademie FreibergGörlitzGermany

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