Influence of graphene addition and sintering temperature on physical properties of Si3N4 matrix composites

Tomasz Cygan , Jarosław Woźniak , Marek Kostecki , Bogusława Adamczyk-Cieślak , Andrzej Olszyna


The Si3N4-graphene composites (1 wt% addition of graphene) were manufactured using powder metallurgy and consolidated using the Spark Plasma Sintering (SPS) method. In order to achieve composites with high mechanical properties, optimisation of a Si3N4 and Si3N4-graphene sintering temperatures were carried on for five and four different sintering temperatures respectively. Obtained samples were characterised by measurements of their density, hardness, fracture toughness and Young's modulus. Qualitative and quantitative phase composition was analysed by XRD diffraction. Microstructure analysis of sinters was also performed using Scanning Electron Microscopy (SEM). The highest relative density (99.31% and 99.32%) and fracture toughness (KIC = 6.0 MPa ∗ - m0.5) was measured for samples sintered at 1650 °C and 1700 °C respectively, for Si3N4 and Si3N4-Gn composite. That shows no increase of fracture toughness between pure silicon nitride sinter and composite with 1% wt of graphene. Furthermore, XRD results showing 33% less of β grains in Si3N4-Gn composite compared to pure Si3N4 sample, proving that graphene stabilise the α phase in silicon nitride.

Author Tomasz Cygan (FMSE / DSMP)
Tomasz Cygan,,
- Division of Ceramic Materials and Polymers
, Jarosław Woźniak (FMSE / DSMP)
Jarosław Woźniak,,
- Division of Ceramic Materials and Polymers
, Marek Kostecki (FMSE / DSMP)
Marek Kostecki,,
- Division of Ceramic Materials and Polymers
, Bogusława Adamczyk-Cieślak (FMSE / DMD)
Bogusława Adamczyk-Cieślak,,
- Division of Materials Design
, Andrzej Olszyna (FMSE / DSMP)
Andrzej Olszyna,,
- Division of Ceramic Materials and Polymers
Journal seriesInternational Journal of Refractory Metals and Hard Materials, ISSN 0958-0611
Issue year2016
ASJC Classification2505 Materials Chemistry; 2506 Metals and Alloys; 2210 Mechanical Engineering; 2211 Mechanics of Materials; 2503 Ceramics and Composites
Languageen angielski
Score (nominal)5
Score sourcejournalList
ScoreMinisterial score = 0.0, 10-06-2020, ArticleFromJournal
Ministerial score (2013-2016) = 5.0, 10-06-2020, ArticleFromJournal
Publication indicators Scopus Citations = 15; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.736
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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