Mechanical properties of Si₃N₄ – graphene composites sintered by SPS method

• Autorzy: Klimczyk P. , Jaworska L. , Cygan S. , Morgiel J. , Major Ł. , Olszyna A.

Identyfikatory

DOI

10.7356/iod.2017.20

• Języki publikacji: EN

Abstrakty

EN

Silicon nitride powder with a small addition of magnesium oxide and yttria stabilized tetragonal zirconia fine particles was used as a starting material. Multilayer graphene nanoplatelets were used as filler for silicon nitride based composites. Graphene content in the mixtures was 0‒2 wt. %. The composites were obtained by the Spark Plasma Sintering method at 1650°C under 35 MPa of uniaxial pressure. Separation of the agglomerated graphene platelets in the matrix was observed for these materials. Insufficient dispersity of graphene slightly decreased the mechanical properties of Si₃N₄ ceramics. The SEM and TEM microstructural analysis of sintered materials show that the applied pressure during the sintering process leads to the orientation of the graphene phase and in consequence causes anisotropy of properties. The differences of friction coefficients were examined with the Ball-on-Disc method for the two directions (parallel and perpendicular to the pressing axis). Also the specific wear rate of the ball for the direction parallel to pressing axis differ significantly in comparison to the wear for the direction perpendicular to the pressing direction.

Słowa kluczowe

EN

silicon nitride; graphene; Young's modulus; hardness; friction coefficient; wear rate

• Wydawca: Instytut Odlewnictwa
• Czasopismo: Prace Instytutu Odlewnictwa
• Rocznik: 2017
• Tom: Vol. 57, no. 4
• Strony: 235--239
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Klimczyk P.

• The Institute of Advanced Manufacturing Technology, ul. Wroclawska 37A, 30-011 Krakow, Poland

autor

Jaworska L.

• The Institute of Advanced Manufacturing Technology, ul. Wroclawska 37A, 30-011 Krakow, Poland

autor

Cygan S.

• The Institute of Advanced Manufacturing Technology, ul. Wroclawska 37A, 30-011 Krakow, Poland

autor

Morgiel J.

• Institute of Metallurgy and Materials Science, Polish Academy of Science, ul. W. Reymonta 25, 30-059 Krakow, Poland

autor

Major Ł.

• Institute of Metallurgy and Materials Science, Polish Academy of Science, ul. W. Reymonta 25, 30-059 Krakow, Poland

autor

Olszyna A.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, ul. Wołoska 141, 02-507 Warsaw, Poland

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).