Effects of mechanically alloying Al 2 O 3 and Y 2 O 3 additives on the liquid phase sintering behavior and properties of SiC
Ceramics International, ISSN: 0272-8842, Vol: 48, Issue: 21, Page: 31679-31685
2022
- 16Citations
- 44Usage
- 9Captures
- 1Mentions
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Metrics Details
- Citations16
- Citation Indexes16
- 16
- CrossRef4
- Usage44
- Abstract Views44
- Captures9
- Readers9
- Mentions1
- News Mentions1
- News1
Most Recent News
Studies from Missouri University of Science and Technology Add New Findings in the Area of Ceramics Research (Effects of Mechanically Alloying Al2o3 and Y2o3 Additives On the Liquid Phase Sintering Behavior and Properties of Sic)
2022 NOV 08 (NewsRx) -- By a News Reporter-Staff News Editor at Tech Daily News -- A new study on Technology - Ceramics Research is
Article Description
In order to improve the sintering of SiC, mixtures of Al 2 O 3 and Y 2 O 3 powders are commonly included as sintering additives. The aim of this work was to use mechanically alloyed Al 2 O 3 –Y 2 O 3 mixtures as sintering additives to promote liquid phase sintering of SiC using spark plasma sintering. The results showed that milling reduced the particle size of the powders and led to the formation of complex oxide phases (YAP, YAM, and YAG) at low temperatures. As the ball milling time increased, the mass loss of specimens sintered with mechanically alloyed Al 2 O 3 –Y 2 O 3 mixtures decreased, and accordingly the relative density increased. However, the hardness and flexural strength of sintered SiC specimens first increased and then decreased. Because the specimens prepared with oxides milled for a long time contained too much YAG/YAP and accordingly too much liquid at sintering temperature. This negatively affected the mechanical properties of the SiC specimens because of the increased volume of the complex oxide phases, which have inferior mechanical properties to SiC, in the sintered specimens. When the ball milling time was 6 h, the hardness (24.02 GPa) and flexural strength (655.61 MPa) of the SiC specimens reached maximum values.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0272884222024750; http://dx.doi.org/10.1016/j.ceramint.2022.07.089; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85134619867&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0272884222024750; https://scholarsmine.mst.edu/matsci_eng_facwork/2832; https://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=3885&context=matsci_eng_facwork; https://dx.doi.org/10.1016/j.ceramint.2022.07.089
Elsevier BV
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