Evolution of quenching stress during ceramic thermal spraying with respect to plasma parameters
- CEA/DAM, Bruyeres le Chatel (France)
- Univ. de Limoges (France)
- National Research Inst. for Metals, Ibaraki (Japan)
The aim of the paper is to study the quenching stress evolution within deposits with respect to particle parameters at impact and substrate temperature. The use of two alumina particle size distributions and two d.c. plasma torches enable the authors to vary the particle velocity at impact from 90 to 250 m/s. Usual set-ups gave information on the final average stress within deposits with sometimes distributions through the coating thickness. Here, in-situ measurement of the substrate deformation during spraying allowed the authors to calculate the quenching stress and to follow the substrate curvature with respect to coating thickness. Three different torch velocities, leading to different pass thicknesses, were tested. The steel substrates were smoothly sand blasted in order to minimize the stress generated by this treatment and deposits (made of layered beads) were built for substrate temperatures ranging from 150 to 350 C.
- OSTI ID:
- 377769
- Report Number(s):
- CONF-9509182--; ISBN 0-87170-541-9
- Country of Publication:
- United States
- Language:
- English
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