Spark Plasma Sintering and Characterization of Al-TiB2 Composites
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1
Centre for Innovative Manufacturing Research, VIT, Vellore 632014, India
2
School of Mechanical Engineering, VIT, Vellore 632014, India
3
Department of Metallurgical and Materials Engineering, NIT Tiruchirappalli, Tiruchirappalli 620015, India
4
Material Research Institute, Pennsylvania State University, State College, PA 16802, USA
5
Department of Mechanical Engineering, National Chung Cheng University, Chia-Yi 621, Taiwan
*
Author to whom correspondence should be addressed.
†
Equally contributed as 1st author.
Metals 2020, 10(9), 1110; https://doi.org/10.3390/met10091110
Received: 15 July 2020 / Revised: 15 August 2020 / Accepted: 17 August 2020 / Published: 19 August 2020
(This article belongs to the Special Issue Spark Plasma Sintering of Metals and Metal Matrix Nanocomposites)
In this study, Al-TiB2 compacts fabricated by spark plasma sintering methods at different temperatures were characterized for densification, microstructural development, and mechanical properties. Sintering parameters used were temperatures of 500 °C and 550 °C under the pressure of 30 MPa. A very dense microstructure with uniform phase distribution and porosity was produced in the sample sintered at 550 °C with 2.5 wt% TiB2. The same sample exhibited excellent hardness value, and a high-tensile strength attributed to full metallurgical bonding, presence of sub-micron sized grains, and their uniform distribution. These results show that the TiB2 addition enhanced the composite’s hardness, sintered density, and tensile strength. In all the sintered samples, the fractographs revealed a mixed-mode fracture (ductile and brittle).
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Keywords:
aluminum alloy; metal matrix composites (MMCs); Al-6061TiB2; spark plasma sintering; characterization; microstructure
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MDPI and ACS Style
Annamalai, A.R.; Srikanth, M.; Muthuchamy, A.; Acharya, S.; Khisti, A.; Agrawal, D.K.; Jen, C.-P. Spark Plasma Sintering and Characterization of Al-TiB2 Composites. Metals 2020, 10, 1110. https://doi.org/10.3390/met10091110
AMA Style
Annamalai AR, Srikanth M, Muthuchamy A, Acharya S, Khisti A, Agrawal DK, Jen C-P. Spark Plasma Sintering and Characterization of Al-TiB2 Composites. Metals. 2020; 10(9):1110. https://doi.org/10.3390/met10091110
Chicago/Turabian StyleAnnamalai, A. R.; Srikanth, Muthe; Muthuchamy, A.; Acharya, Shashank; Khisti, Anup; Agrawal, Dinesh K.; Jen, Chun-Ping. 2020. "Spark Plasma Sintering and Characterization of Al-TiB2 Composites" Metals 10, no. 9: 1110. https://doi.org/10.3390/met10091110
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