2012 Fiscal Year Final Research Report
Improvement of rolling contact fatigue strength of ceramics by self-crack healing
| Project/Area Number |
22686013
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Yokohama National University |
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Principal Investigator |
TAKAHASHI Koji 横浜国立大学, 大学院・工学研究院, 教授 (90334630)
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| Project Period (FY) |
2010 – 2012
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| Keywords | セラミックス / 転動疲労強度 / 自己き裂治癒 / ショットピーニング / 残留応力 |
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| Research Abstract |
Ceramics are expected as high performance bearings. So investigation of the rolling contact fatigue strength is crucially important. To evaluate the effects of the shot peening and crack-healing on the rolling contact fatigue strength, rolling contact fatigue tests were carried out on Si3N4 and Al2O3/SiC composite. For Si3N4 ceramics, the rolling contact fatigue strength was improved by shot peening. For Al2O3/SiC composite the rolling contact fatigue strength increased by combination of shot peening and crack-healing.
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