Thermal plasma CVD and wear resistance of double layered Ti–Si–B–C/Ti–B–C coatings on WC–Co cutting tools with various roughness
| Autor: | Isao Yamazaki, Jiro Tsujino, Yusuke Fuji, Shiro Shimada |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Scanning electron microscope Metallurgy Composite number chemistry.chemical_element Surfaces and Interfaces General Chemistry Surface finish engineering.material Condensed Matter Physics Microstructure Surfaces Coatings and Films Coating chemistry Materials Chemistry engineering Thin film Boron Titanium |
| Zdroj: | Surface and Coatings Technology. 204:1715-1721 |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2009.10.056 |
| Popis: | The double-layer deposition of composite SiC–TiBC (Ti–Si–B–C) films with various Si contents (0, 40, 55, 60 and 100 mol%) on Ti–B–C was achieved from mixtures of titanium tetra-ethoxide, boron tri-ethoxide, and/or hexa-methyl-disiloxane solutions at about 700 °C on WC–Co cutting tools by Ar/H 2 thermal plasma CVD. The crystalline phases of TiB 2 , TiC, and SiC were identified in the coatings by thin film grazing incidence X-ray diffraction. The surfaces and cross-sections of the double-layer coatings were observed by scanning electron microscopy to reveal their microstructure. Cutting tests of the double-layer Ti–Si–B–C/Ti–B–C were carried out by determining the flank and crater wear. The wear rate of the double-layer formed with the Ti–Si–B–C composite over-layer with 55 mol% Si was the slowest of the five samples. In addition, the effect of surface roughnesses (Ra (μm) = 0.03, 0.20 and 0.55) on the coating and wear resistance of the double-layer Ti–Si–B–C/Ti–B–C with 55 mol% Si was investigated by cross-sectional SEM observation and cutting tests. |
| Databáze: | OpenAIRE |
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