Abstract
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.
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Acknowledgments
The authors sincerely acknowledge the financial support received from the Aeronautical Research and Development Board, New Delhi, Government of India (Grant No. ARDB/01/2031765/M/I). We thank our colleague Dr. Anjana Jain, Materials Science Division, CSIR-NAL, for recording the XRD patterns, and Mr. Siju, Surface Engineering Division, CSIR-NAL, for the FE-SEM work.
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Manuscript submitted December 19, 2018.
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Rangaraj, L., Sagar, R.V., Stalin, M. et al. Synthesis, Characterization, and Mechanical Properties Evaluation of Mg-Ti3AlC2 Composites Produced by Powder Metallurgy/Hot Pressing. Metall Mater Trans A 50, 3714–3723 (2019). https://doi.org/10.1007/s11661-019-05289-8
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DOI: https://doi.org/10.1007/s11661-019-05289-8