Synthesis, Characterization, and Mechanical Properties Evaluation of Mg-Ti3AlC2 Composites Produced by Powder Metallurgy/Hot Pressing
| Autor: | K. Venkateswarlu, Lingappa Rangaraj, K. Raghavendra, M. Stalin, R. V. Sagar |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Composite number Metallurgy 0211 other engineering and technologies Metals and Alloys 02 engineering and technology Condensed Matter Physics Hot pressing 01 natural sciences Indentation hardness Carbide Compressive strength Flexural strength Mechanics of Materials Powder metallurgy 0103 physical sciences Relative density Composite material 021102 mining & metallurgy |
| Zdroj: | Metallurgical and Materials Transactions A. 50:3714-3723 |
| ISSN: | 1543-1940 1073-5623 |
| Popis: | Magnesium (Mg)-titanium aluminum carbide (Ti3AlC2) composites were produced by hot pressing (HP) at 0.15 to 1 MPa, 923 K (650 °C) for 30 minutes; Mg-Ti3AlC2 (10 to 30 vol pct) composite produced at 0.15 MPa, 923 K (650 °C) for 30 minutes exhibited 95 to 99 pct relative density (RD), while Mg-40Ti3AlC2 produced at 1 MPa, 923 K (650 °C) for 30 minutes exhibited full density. Improved densification results are mainly due to the flow of liquid Mg between the Ti3AlC2 particles. The monolithic Mg processed at 5 MPa, 873 K (600 °C) for 5 minutes also exhibited full density. Further, Mg-Ti3AlC2 composites produced at low pressure (1 MPa) exhibited maximum density as compared to other research works. Monolithic Mg exhibited a microhardness of 62 ± 8 HV0.5. Besides, as the Ti3AlC2 content was varied from 10 to 40 vol pct, the microhardness of Mg-Ti3AlC2 composites increased from 62 ± 5 to 158 ± 11 HV0.5. The compressive strength of Mg-Ti3AlC2 (10 to 40 vol pct) composite at room temperature (RT) was in the range of 180 ± 10 to 617 ± 13 MPa. The compressive strengths of Mg-Ti3AlC2 (30 and 40 vol pct) composites at 473 K (200 °C) were 366 ± 20 and 480 ± 71 MPa, respectively. The flexural strength of Mg-Ti3AlC2 composites (20 to 40 vol pct) was determined to be in the range of 335 ± 12 to 513 ± 3 MPa. |
| Databáze: | OpenAIRE |
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