Effects of tungsten and aluminium on the oxidation and phase formation in mechanically alloyed Ti(C,N)–W–Al systems
| Autor: | Nedret Can, Kasonde Maweja, L.A. Cornish |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
digestive oral and skin physiology Metallurgy technology industry and agriculture food and beverages chemistry.chemical_element Tungsten complex mixtures Oxygen respiratory tract diseases Strain energy Chemical engineering chemistry Aluminium Materials Chemistry Ceramics and Composites Cold welding Particle size Ball mill Dissolution |
| Zdroj: | Journal of the European Ceramic Society. 32:3583-3592 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2012.05.010 |
| Popis: | The effects of milling parameters and composition of the powder mixtures on the transformations of Ti(C,N)–W–Al powders processed by high energy ball milling were investigated by XRD, SEM and TEM. The strain energy and the fine particle size contributed to the high chemical reactivity with oxygen of the powders milled for 12–24 h. Powders milled for 48 h were chemically stable. The affinity with oxygen decreased after W dissolution in Ti(C,N), and the subsequent decrease in lattice strains. Aluminium lowered the lattice strains, and subsequently the strain energy stored in the deformed crystals of Ti(C0.5N0.05) and W milled above 25 °C. Fracturing of hard particles dominated in the early stage of milling in the absence of Al, whereas with Al, plastic deformation of particles and cold welding of Ti(C,N) and W particles by the softer Al prevailed at the same time. |
| Databáze: | OpenAIRE |
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