2002 Fiscal Year Final Research Report Summary
Study on Improvement of Fatigue Strength and Thermal Fatigue Strength of High Density Low Pressure Plasma Sprayed Material.
| Project/Area Number |
13650089
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Osaka university |
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Principal Investigator |
NISHIKAWA Izuru Osaka university, School of Engineering Science. Assoc. Prof., 基礎工学研究科, 助教授 (90189267)
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| Co-Investigator(Kenkyū-buntansha) |
WAKI Hiroyuki Osaka university, School of Engineering Science, Assist. Prof., 基礎工学研究科, 助手 (30324825)
KIDA Katsuyuki Osaka university, School of Engineering Science, assist. Prof., 基礎工学研究科, 助手 (00271031)
OGURA Keiji Osaka university, School of Engineering Science, Prof., 基礎工学研究科, 教授 (70029007)
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| Project Period (FY) |
2001 – 2002
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| Keywords | Ceramics spray / Laser speckle / Strain measurement / High temperature fatigue / Delamination / Internal crack / Crack growth / Low pressure spray |
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| Research Abstract |
Fatigue tests were conducted at both 893K and room temperature for a zirconia-sprayed type 304 stainless steel. Surface strain was monitored by using a laser speckle strain gauge during the fatigue test to examine the fatigue processes such as cracking and, delamination of subsurface layer. Fatigue life of an Atomospheric Plasma Spraying(APS) zirconia-coated specimen was similar to that of a blasted substrate. A cracking occurred in the ceramics layer at the early stage of fatigue failure and the crack penetration into the substrate. In case of a Low Pressure Plasma Spraying (LPPS) zirconia-coated specimen, the fatigue life was longer than that of a blasted substrate. The bond coating layer made by LPPS was found to restrain a crack from initiating in the substrate.
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Research Products
(16 results)
