LAPSE:2020.0896
Published Article
LAPSE:2020.0896
Spark Plasma Sintering of Cobalt Powders in Conjunction with High Energy Mechanical Treatment and Nanomodification
July 17, 2020
Spark plasma sintering (SPS) investigations were carried out on three sets of Co specimens: untreated, high energy mechanically (HEMT) pre-treated, and nanomodified powders. The microstructure, density, and mechanical properties of sintered pellets were investigated as a function of various pre-treatments and sintering temperatures (700−1000 °C). Fine-grained sinters were obtained for pre-treated Co powders; nano-additives tended to inhibit grain growth by reinforcing particles at grain boundaries and limiting grain-boundary movement. High degree of compaction was also achieved with relative densities of sintered Co pellets ranging between 95.2% and 99.6%. A direct co-relation was observed between the mechanical properties and densities of sintered Co pellets. For a comparable sinter quality, sintering temperatures for pre-treated powders were lower by 100 °C as compared to untreated powders. Highest values of bending strength (1997 MPa), microhardness (305 MPa), and relative density (99.6%) were observed for nanomodified HEMT and SPS processed Co pellets, sintered at 700 °C.
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Keywords
densification, mechanical processing, mechanical properties, nanomodification, spark plasma sintering
Subject
Suggested Citation
Nguyen VM, Khanna R, Konyukhov Y, Nguyen TH, Burmistrov I, Levina V, Golov I, Karunakaran G. Spark Plasma Sintering of Cobalt Powders in Conjunction with High Energy Mechanical Treatment and Nanomodification. (2020). LAPSE:2020.0896
Author Affiliations
Nguyen VM: Institute of Research and Development, Duy Tan University, Danang 550000, Vietnam [ORCID]
Khanna R: School of Materials Science and Engineering (Ret.), University of New South Wales (UNSW), Kensington, Sydney 2052, Australia
Konyukhov Y: Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology “MISiS”, Moscow 119049, Russia
Nguyen TH: Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology “MISiS”, Moscow 119049, Russia [ORCID]
Burmistrov I: Engineering Centre, Plekhanov Russian University of Economics, Moscow 117997, Russia [ORCID]
Levina V: Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology “MISiS”, Moscow 119049, Russia
Golov I: Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology “MISiS”, Moscow 119049, Russia
Karunakaran G: Biosensor Research Institute, Department of Fine Chemistry, Seoul National University of Science and Technology (Seoul Tech.), Seoul 232, Korea
Khanna R: School of Materials Science and Engineering (Ret.), University of New South Wales (UNSW), Kensington, Sydney 2052, Australia
Konyukhov Y: Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology “MISiS”, Moscow 119049, Russia
Nguyen TH: Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology “MISiS”, Moscow 119049, Russia [ORCID]
Burmistrov I: Engineering Centre, Plekhanov Russian University of Economics, Moscow 117997, Russia [ORCID]
Levina V: Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology “MISiS”, Moscow 119049, Russia
Golov I: Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology “MISiS”, Moscow 119049, Russia
Karunakaran G: Biosensor Research Institute, Department of Fine Chemistry, Seoul National University of Science and Technology (Seoul Tech.), Seoul 232, Korea
Journal Name
Processes
Volume
8
Issue
5
Article Number
E627
Year
2020
Publication Date
2020-05-23
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr8050627, Publication Type: Journal Article
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LAPSE:2020.0896
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doi:10.3390/pr8050627
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[v1] (Original Submission)
Jul 17, 2020
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Jul 17, 2020
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https://psecommunity.org/LAPSE:2020.0896
Original Submitter
Calvin Tsay
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