High-performance, low-cost titanium metal matrix composites
| Autor: | M. Zadra, L. Girardini |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Titanium carbide Carbotanium Mechanical Engineering Metallurgy chemistry.chemical_element Titanium alloy Spark plasma sintering Condensed Matter Physics Carbide chemistry.chemical_compound chemistry Mechanics of Materials visual_art Ultimate tensile strength visual_art.visual_art_medium General Materials Science Ceramic Composite material Titanium |
| Zdroj: | Materials Science and Engineering: A. 608:155-163 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2014.04.066 |
| Popis: | Titanium-based discontinuously reinforced metal matrix composites were obtained by mechanical alloying and spark plasma sintering. Titanium sponge was used as a raw material to minimize costs, and a small amount of calcium was added as a process control agent. α and β Titanium matrices were obtained by the use of two different compositions, and 3 wt% carbon black was used as the carbide former. The milled powder was then sintered at low temperature and low pressure. An in-situ precipitation occurred involving a fine and well dispersed distribution of titanium carbide in a titanium matrix. Depending on the starting composition, the volumetric quantity of titanium carbide was between 23 and 31 vol%. Despite the high ceramic loading, all of the samples could withstand tensile loading with distinct plastic deformation. The best samples showed a yield stress of 1013 MPa, Young׳s modulus of 137 GPa, an ultimate tensile stress of 1181 MPa and a strain at fracture of 5%. These results were obtained without any other additional heat treatment or hot deformation step. |
| Databáze: | OpenAIRE |
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