Diamond deposition onto WC-6%Co cutting tool material: coating structure and interfacial bond strength
| Autor: | D.R. Tallant, D.E. Peebles, M. Alam |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
congenital
hereditary and neonatal diseases and abnormalities Materials science Metallurgy Metals and Alloys chemistry.chemical_element Substrate (chemistry) Diamond Surfaces and Interfaces Adhesion engineering.material Nanocrystalline material Surfaces Coatings and Films Electronic Optical and Magnetic Materials body regions Coating chemistry Chemical engineering Boron oxide hemic and lymphatic diseases parasitic diseases Materials Chemistry engineering Boron Cobalt |
| Zdroj: | Thin Solid Films. 300:164-170 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/s0040-6090(96)09467-9 |
| Popis: | Diamond coatings were grown on WC-6%Co cutting tool material. Measurements were carried out to investigate the effects of diamond seeding of the substrate before deposition, removal of cobalt from the substrate before deposition, and boron incorporation into the coating during growth on the growth rate, morphology and structure of the coating, and coating-substrate edhesion. Diamond seeding of the substrate resulted in a higher growth rate and diamond fraction of the coating relative to a polished and unseeded surface. Etching of cobalt from the substrate resulted in a higher growth rate, diamond fraction and adhesion strength relative to the unetched surface. Introduction of methanol into the gas phase led to a lower growth rate, diamond fraction and adhesion strength relative to the case when no methanol was injected. Introduction of boron oxide (B2O3) along with methanol into the gas phase did not affect the growth rate but increased both the diamond fraction and adhesion strength relative to the case when only methanol was added. It is believed that adhesion failure occurs at the diamond-substrate interface, possibly within a soft nanocrystalline graphite transition layer. |
| Databáze: | OpenAIRE |
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