Microstructure and properties of tib2 composites produced by spark plasma sintering with the addition of Ti5Si3
Authors:
- Agnieszka Twardowska,
- Marcin Podsiadło,
- Iwona Sulima,
- Krzysztof Bryła,
- Paweł Hyjek
Abstract
Titanium diboride (TiB2) is a hard, refractory material, attractive for a number of applica-tions, including wear-resistant machine parts and tools, but it is difficult to densify. The spark plasma sintering (SPS) method allows producing TiB2-based composites of high density with different sinter-ing aids, among them titanium silicides. In this paper, Ti5Si3 is used as a sintering aid for the sintering of TiB2/10 wt % Ti5Si3 and TiB2/20 wt % Ti5Si3 composites at 1600◦C and 1700◦C for 10 min. The phase composition of the initial powders and produced composites was analyzed by the X-ray diffraction method using CuKα radiation. The microstructure was examined using scanning electron microscopy, accompanied by energy-dispersive spectroscopy (EDS). The hardness was determined using a diamond indenter of Vickers geometry loaded at 9.81 N. Friction–wear properties were tested in the dry sliding test in a ball-on-disc configuration, using WC as a counterpart material. The major phases present in the TiB2/Ti5Si3 composites were TiB2 and Ti5Si3. Traces of TiC were also identified. The hardness of the TiB2/Ti5Si3 composites was in the range of 1860–2056 HV1 and decreased with Ti5Si3 content, as well as the specific wear rate Wv. The coefficient of friction for the composites was in the range of 0.5–0.54, almost the same as for TiB2 sinters. The main mechanism of wear was abrasive.
- Record ID
- CUT57de36307de34db4b20e90a9a02dafbd
- Publication categories
- ;
- Author
- Journal series
- Materials, ISSN , e-ISSN 1996-1944, Biweekly
- Issue year
- 2021
- Vol
- 14
- No
- 14
- Pages
- [1-11]
- Article number
- 3812
- Other elements of collation
- il. (w tym kolor.); Bibliografia (na s.) - 10-11; Bibliografia (liczba pozycji) - 19; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 14, Iss. 14, Spec. Iss.
- Substantive notes
- Special Issue: Novel High-Temperature Materials: Preparation, Characterization, and Applications
- Keywords in English
- friction–wear properties, hardness, spark plasma sintering, Ti5Si3, TiB2
- DOI
- DOI:10.3390/ma14143812 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1944/14/14/3812 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT57de36307de34db4b20e90a9a02dafbd/
- URN
urn:pkr-prod:CUT57de36307de34db4b20e90a9a02dafbd
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