Fracture surface analysis of free-standing diamond films
Free-standing CVD diamond disk-shaped films of varying thicknesses between ∼40 and 1000 μm were fractured in ball-on-ring flexure using a high-precision hydraulic testing machine. Some of the films were smooth on the side formerly in contact with the substrate and rough (large crystallites) on the r...
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| Published in: | Journal of materials research Vol. 9; no. 6; pp. 1540 - 1545 |
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| Main Authors: | , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
New York, USA
Cambridge University Press
01-06-1994
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| Online Access: | Get full text |
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| Summary: | Free-standing CVD diamond disk-shaped films of varying thicknesses between ∼40 and 1000 μm were fractured in ball-on-ring flexure using a high-precision hydraulic testing machine. Some of the films were smooth on the side formerly in contact with the substrate and rough (large crystallites) on the reverse side and some of the films were polished. Raman spectroscopic examination showed some of the films to be of high quality and others to be of lower quality (higher levels of non-diamond carbon mixed with diamond phase). All fracture surfaces were examined to identify the origin of failure. Strength varied between 650 and 971 MPa, and the fracture toughness was determined from fracture surface analysis to average 8 ± 1 MPam1/2. |
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| Bibliography: | PII:S0884291400074276 ark:/67375/6GQ-0V29N3BT-G istex:F6D1A53CF38342A467B4EED093995230B0D2AB24 ArticleID:07427 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
| ISSN: | 0884-2914 2044-5326 |
| DOI: | 10.1557/JMR.1994.1540 |