Hardness and adhesive properties of (Cr,Mo) oxycarbide films on stainless steel via vapor deposition
- Institute of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan 106, People`s Republic of (China)
A hexacarbonyl of chromium and molybdenum [(Cr,Mo)(CO){sub 6}] was used as a oxycarbide source for the coating on stainless steel 304 (SS304) at temperatures varied from 175{degree}C to 450{degree}C. Hardness of the films was determined from a microindentation technique through a similar calculation after Thomas (1987). Intrinsic hardnesses of the films formed at low and medium temperatures were determined to be 8.61 and 2.75 GPa, respectively. Both of them are larger than that of SS304 substrate, 1.75 GPa. Adhesive strength of the films were measured by the scratching test. The results reveal that the adhesive strengths of the films formed at low, medium and high temperatures are 2.8 N, 37.6 N, and 36.0 N, respectively. Two different fracture modes after scratching were found for the films obtained at various temperature regions. A spalling-off type or a deformation failure with many cracks and deformation bands beside the striation was found. {copyright} {ital 1996 Materials Research Society.}
- OSTI ID:
- 399785
- Journal Information:
- Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 11 Vol. 11; ISSN JMREEE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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