Reaction enthalpies as selection criteria for tribological coatings

N. Ooi, James Adams, Uttam Singisetti

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A wide range of coatings are used for a variety of applications. Selection criteria for these coatings include coating-substrate adhesion, hardness, melting temperature, coefficient of thermal expansion mismatch, corrosion resistance, and cost. A factor often ignored is the possibility of reaction between the coating and the other surface which it contacts during use. This is especially important when frictional forces produce enough heat to locally melt asperities or even cause friction welding, as that heat will enhance the likelihood of chemical reactions at the interface. One aspect of this is to consider the reaction enthalpies between coatings and the surfaces they contact during operation. We explore the use of reaction enthalpies between coatings and opposing surfaces as a criteria for selecting coatings. Simple thermodynamic calculations are presented for several couples of coating - Opposing surfaces. Conclusions are drawn about the relevance based on experimental evidence.

Original languageEnglish (US)
Pages (from-to)44-47
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume239
Issue number1
DOIs
StatePublished - Sep 2003

Fingerprint

Enthalpy
enthalpy
coatings
Coatings
friction welding
heat
Friction welding
corrosion resistance
coating
thermal expansion
chemical reactions
adhesion
hardness
Thermal expansion
Melting point
Corrosion resistance
Chemical reactions
melting
Adhesion
costs

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Reaction enthalpies as selection criteria for tribological coatings. / Ooi, N.; Adams, James; Singisetti, Uttam.

In: Physica Status Solidi (B) Basic Research, Vol. 239, No. 1, 09.2003, p. 44-47.

Research output: Contribution to journalArticle

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