紀要論文

紀要論文

text

Transactions of JWRI. 2007, 36(2), p. 87-94

Crack Branching Phenomenon of Zirconia Plasma Spray Coating

英語

text

2007-12

Gas tunnel plasma spray coating technology has been introduced as one of the recent advances in smart coating technology. Several factors control the quality of the final product of the coating material. Some factors can be summarized as the gas discharge rate, powder size, powder rate, plasma size and temperature, heating time, cooling rate and time, coating time, number of coating layers, relative speed of the sample and plasma spray, etc. These factors have a certain role in addition to the quality in determination of the safe life time of the coating product. Safe life time length and sustainability are actually control the cost and economy of the coating product. Life and history of coating composite will depend on the ability of the composite material to resist failure through fracture, crack propagation, spreading and delamination. The plasma spray coating composite often suffers from cracks and delaminations. Therefore, this research was carried out as a part of our study of zirconia coating to study fracture in early ages of plasma spray coating. Also, this research introduces a method of studying fracture during the life history of the coating composite. This paper discusses a very important problem in fracture mechanics science which is the branching phenomena of the cracks during the process of fracture. This treatment of the branching phenomena of cracks is newly introduced. It depends on the distribution of stresses at the crack tips under remote loading and involves experimental observations in order to have a logical philosophy and understanding for this abnormal natural phenomenon.

10.18910/5995

5995

Crack Branching Phenomenon of Zirconia Plasma Spray Coating

大阪大学接合科学研究所

英語

2007-12

Transactions of JWRI

36

2

87

94

https://hdl.handle.net/11094/5995

10.18910/5995

https://doi.org/10.18910/5995