420 プラズマ溶射CoNiCrAlY皮膜円管の横圧縮試験と機械的特性の膜厚依存性(OS コーティング・溶射)

概要

論文の詳細を見る
Lateral compression tests for plasma-sprayed CoNiCrAlY coatings were carried out. In considering the deformation of tubes, the elastic contact with a flat plate and a tube surface was taken into account as well as the bending of the curved beam of the tube. Young's modulus of mild steel tubes obtained from the lateral compression tests agreed well with the true value. In order to examine the effects of spraying processes on mechanical properties of sprayed coatings, coatings were sprayed by both Atmospheric Plasma Spray(APS) and Low Pressure Plasma Spray(LPPS) and three types of spraying powder size were selected. Tube specimens with thickness of 150〜700μm independent of substrates were manufactured by dissolving out the substrate by nitric acid. It was found that Young's modulus and fracture stresses in lateral compression increased with an increase of coating thickness and those also increased by diffusion thermal treatment.
社団法人日本機械学会の論文
2004-11-05