Development of a System for Analysing Damage Mechanism of Coatings in Scratch Test
| Project/Area Number |
07555619
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
MUTOH Yoshiharu Nagaoka University of Technology, Dept.of Mech.Eng., Professor, 工学部, 教授 (00107137)
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| Co-Investigator(Kenkyū-buntansha) |
IHARA Ikuo Nagaoka University of Technology, Dept.of Mech.Eng., Research Associate, 工学部, 助手 (80203280)
KOGUCHI Hodeo Nagaoka University of Technology, Dept.of Mech.Eng., Associate Professor, 工学部, 助教授 (90143693)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
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| Keywords | Scratch Test / Coating / Damage Mechanism / In situ Observation / Adhesive Strength |
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| Research Abstract |
(1)A scratch test machine with in situ observable micrography has been developed. Frictional force and AE signal can also be monitored in the present machine to estimate the critical load. Failure processes of coatings can be continueously observed and monitored through a video recorder.
(2)The critical loads for four kinds of thin films (CVD-TiC,PVD-TiC,CVD-TiN and PVD-TiN) coated on SKH57 high speed steel substrate could successfully be evaluated using the present scratch test system.
(3)Scratch tests of Hf-coated glass were carried out and corresponding damage processes were observed in situ. Ling-shaped cracks were nucleated in Hf film with increase in compressive load. They were overlapped each other with movement of the indentor to occur local spalling of the film.
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Report
(3 results)
Research Products
(10 results)
