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Microstructure and Properties of Thermal Electrode Material Si(3)N(4)–MoSi(2) Composite Ceramics
With good high temperature and corrosive resistance performance, ceramic based composites can be used as promising materials to replace metal thermocouple materials. In this study, Si(3)N(4)–MoSi(2) composites were prepared via hot pressing technology. X-ray diffraction (XRD), optical microscopy (OM...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6025570/ https://www.ncbi.nlm.nih.gov/pubmed/29891802 http://dx.doi.org/10.3390/ma11060986 |
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author | Feng, Lichao Guan, Pengfei Yu, Xuemei He, Yiqiang |
author_facet | Feng, Lichao Guan, Pengfei Yu, Xuemei He, Yiqiang |
author_sort | Feng, Lichao |
collection | PubMed |
description | With good high temperature and corrosive resistance performance, ceramic based composites can be used as promising materials to replace metal thermocouple materials. In this study, Si(3)N(4)–MoSi(2) composites were prepared via hot pressing technology. X-ray diffraction (XRD), optical microscopy (OM), and scanning electron microscopy (SEM) were used to analyze the microstructure of the composites. The mechanical properties and electrical conductivity were tested. The results showed that the composites were composed of β-Si(3)N(4), MoSi(2), a small amount of Mo(5)Si(3), and an amorphous glassy phase. The MoSi(2) phase was evenly distributed in the matrix. The percolation network was formed with increasing MoSi(2) content. The strength of the composites reached its maximum value when the MoSi(2) content reached a critical point. The electrical conductivity behaved like a typical percolation phenomenon. The percolation threshold was about 30% to 45%. |
format | Online Article Text |
id | pubmed-6025570 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-60255702018-07-09 Microstructure and Properties of Thermal Electrode Material Si(3)N(4)–MoSi(2) Composite Ceramics Feng, Lichao Guan, Pengfei Yu, Xuemei He, Yiqiang Materials (Basel) Article With good high temperature and corrosive resistance performance, ceramic based composites can be used as promising materials to replace metal thermocouple materials. In this study, Si(3)N(4)–MoSi(2) composites were prepared via hot pressing technology. X-ray diffraction (XRD), optical microscopy (OM), and scanning electron microscopy (SEM) were used to analyze the microstructure of the composites. The mechanical properties and electrical conductivity were tested. The results showed that the composites were composed of β-Si(3)N(4), MoSi(2), a small amount of Mo(5)Si(3), and an amorphous glassy phase. The MoSi(2) phase was evenly distributed in the matrix. The percolation network was formed with increasing MoSi(2) content. The strength of the composites reached its maximum value when the MoSi(2) content reached a critical point. The electrical conductivity behaved like a typical percolation phenomenon. The percolation threshold was about 30% to 45%. MDPI 2018-06-11 /pmc/articles/PMC6025570/ /pubmed/29891802 http://dx.doi.org/10.3390/ma11060986 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Feng, Lichao Guan, Pengfei Yu, Xuemei He, Yiqiang Microstructure and Properties of Thermal Electrode Material Si(3)N(4)–MoSi(2) Composite Ceramics |
title | Microstructure and Properties of Thermal Electrode Material Si(3)N(4)–MoSi(2) Composite Ceramics |
title_full | Microstructure and Properties of Thermal Electrode Material Si(3)N(4)–MoSi(2) Composite Ceramics |
title_fullStr | Microstructure and Properties of Thermal Electrode Material Si(3)N(4)–MoSi(2) Composite Ceramics |
title_full_unstemmed | Microstructure and Properties of Thermal Electrode Material Si(3)N(4)–MoSi(2) Composite Ceramics |
title_short | Microstructure and Properties of Thermal Electrode Material Si(3)N(4)–MoSi(2) Composite Ceramics |
title_sort | microstructure and properties of thermal electrode material si(3)n(4)–mosi(2) composite ceramics |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6025570/ https://www.ncbi.nlm.nih.gov/pubmed/29891802 http://dx.doi.org/10.3390/ma11060986 |
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