Mechanical and wear properties of Si3N4 reinforced titanium composites
IR@NISCAIR: CSIR-NISCAIR, New Delhi - ONLINE PERIODICALS REPOSITORY (NOPR)
View Archive Info| Field | Value | |
| Title |
Mechanical and wear properties of Si3N4 reinforced titanium composites
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| Creator |
Mutuk, Tugba
Gürbüz, Mevlüt |
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| Subject |
Titanium
Compressive strength Microstructure Silicon nitride Powder metallurgy |
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| Description |
1027-1036
In the present study, Si<sub>3</sub>N<sub>4</sub> reinforced titanium composites have been produced by the powder metallurgy method. The effect of various percentages of Si<sub>3</sub>N<sub>4</sub> (0-9 wt. %) on the microstructure, density, hardness and compressive strength of titanium (It) composites have been investigated. After sintering at 1100 <sup>o</sup>C for 120 min., the mechanical properties have been significantly developed up to 3 wt. % Si<sub>3</sub>N<sub>4</sub>. The highest hardness and the greatest compressive strength have been obtained for 3 wt. % Si<sub>3</sub>N<sub>4</sub> reinforced composite (698.5 HV and 1093 MPa) when compared to pure titanium (414.2 HV and 826 MPa). Si<sub>3</sub>N<sub>4</sub> addition improved the wear properties of composites when compared to pure titanium. The lowest wear rate (1.36 x 10<sup>-5</sup>, 2.75 x 10<sup>-5</sup> and 5.15 x 10<sup>-5</sup> mm<sup>3 </sup>/ Nm for 10 N, 20 N and 30 N, respectively) have been obtained for 3 wt. % Si<sub>3</sub>N<sub>4</sub> reinforced titanium composite. Above this ratio, the properties of composites have deteriorated due to agglomeration tendency of Si<sub>3</sub>N<sub>4</sub> powder. The scanning electron image, elemental mapping and line analyses confirm the uniform distribution of Si<sub>3</sub>N<sub>4 </sub>powder in Ti matrix. There has been no <em>in-situ</em> formed second phase of composite structure from the X-ray diffraction analyses. |
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| Date |
2021-02-05T06:16:10Z
2021-02-05T06:16:10Z 2020-10 |
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| Type |
Article
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| Identifier |
0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscair.res.in/handle/123456789/56158 |
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| Language |
en_US
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| Rights |
<img src='http://nopr.niscair.res.in/image/cc-license-sml.png'> <a href='http://creativecommons.org/licenses/by-nc-nd/2.5/in' target='_blank'>CC Attribution-Noncommercial-No Derivative Works 2.5 India</a>
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| Publisher |
NISCAIR-CSIR, India
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| Source |
IJEMS Vol.27(5) [October 2020]
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