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Mechanical and wear properties of Si3N4 reinforced titanium composites

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Title Mechanical and wear properties of Si3N4 reinforced titanium composites
 
Creator Mutuk, Tugba
Gürbüz, Mevlüt
 
Subject Titanium
Compressive strength
Microstructure
Silicon nitride
Powder metallurgy
 
Description 1027-1036
In the present study, Si3N4 reinforced titanium composites have been produced by the powder metallurgy method. The effect of various percentages of Si3N4 (0-9 wt. %) on the microstructure, density, hardness and compressive strength of titanium (It) composites have been investigated. After sintering at 1100 oC for 120 min., the mechanical properties have been significantly developed up to 3 wt. % Si3N4. The highest hardness and the greatest compressive strength have been obtained for 3 wt. % Si3N4 reinforced composite (698.5 HV and 1093 MPa) when compared to pure titanium (414.2 HV and 826 MPa). Si3N4 addition improved the wear properties of composites when compared to pure titanium. The lowest wear rate (1.36 x 10-5, 2.75 x 10-5 and 5.15 x 10-5 mm3 / Nm for 10 N, 20 N and 30 N, respectively) have been obtained for 3 wt. % Si3N4 reinforced titanium composite. Above this ratio, the properties of composites have deteriorated due to agglomeration tendency of Si3N4 powder. The scanning electron image, elemental mapping and line analyses confirm the uniform distribution of Si3N4 powder in Ti matrix. There has been no in-situ formed second phase of composite structure from the X-ray diffraction analyses.
 
Date 2021-02-05T06:16:10Z
2021-02-05T06:16:10Z
2020-10
 
Type Article
 
Identifier 0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscair.res.in/handle/123456789/56158
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJEMS Vol.27(5) [October 2020]