Solid Phase’s Transformations in Boron Carbide Based Composites during Heat Treatment
| Autor: | Lembit Kommel, Eduard Kimmari |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Composite number Metallurgy chemistry.chemical_element Boron carbide Atmospheric temperature range Condensed Matter Physics Microstructure Atomic and Molecular Physics and Optics chemistry.chemical_compound Brittleness Flexural strength chemistry Aluminium Phase (matter) General Materials Science Composite material |
| Zdroj: | Solid State Phenomena. 138:175-180 |
| ISSN: | 1662-9779 |
| DOI: | 10.4028/www.scientific.net/ssp.138.175 |
| Popis: | Lightweight B4C/Al composites were produced from powders of boron carbide and aluminum by self-propagating high-temperature synthesis (SHS). The effects of postdensification heat treatment at different temperatures and environmental conditions on phase transformations and properties evolution were studied. Heat treatment processing that followed the synthesis was applied using low heating rate in temperature range from 400°C up to 1500°C. An interconnected multiphase (B4C, Al3BC, and c-BN) microstructure was produced in composite as a result of heat treatment at temperatures below 1080°C. The formation of hard and brittle reaction products (AlN, AlB2, Al4C3, and Al8B4C7) at temperatures above 1150°C causes decrease in bending strength and increase in resistance to unlubricated sliding wear. |
| Databáze: | OpenAIRE |
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