Contact reaction of Kh20N80 alloy with boron nitride
| Autor: | A. L. Gaidarenko, M. E. Belitskii, G. I. Batalin |
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| Rok vydání: | 1976 |
| Předmět: |
Materials science
Metallurgy Alloy Metals and Alloys Sintering chemistry.chemical_element engineering.material Nitride Condensed Matter Physics Chromium chemistry.chemical_compound chemistry Mechanics of Materials Boron nitride Boride Materials Chemistry Ceramics and Composites engineering Boron Solid solution |
| Zdroj: | Soviet Powder Metallurgy and Metal Ceramics. 15:357-362 |
| ISSN: | 1573-9066 0038-5735 |
| DOI: | 10.1007/bf00806470 |
| Popis: | A study was made of the causes of the contact reaction between Kh20N80 alloy and boron nitride during the sintering of composite compacts in various environments at temperatures of 1170–1330°C. It was established that the contact reaction between Kh20N80 alloy and boron nitride occurs in the following stages: partial dissociation of the boron nitride, with the evolution of free nitrogen, which then reacts with the chromium; reaction of boron with the nickel and chromium, with the formation of boride phases; enrichment of the nickel-baseγ solid solution in chromium and the appearance of a chromium-baseβ solid solution. In sintering in various gaseous environments the temperature at which partial melting begins during the contact reaction falls in the order argon (1330°C) > hydrogen and cracked ammonia (1250°C) > vacuum (1170°C). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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