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Silicon infiltrated silicon carbide from extruded thermoplastic wood polymer composites
Author(s) -
Liensdorf Tom,
Schoch Rebecca,
Lang Marieluise,
Langhof Nico,
Hochrein Thomas,
Bastian Martin,
Krenkel Walter
Publication year - 2019
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13404
Subject(s) - materials science , composite material , silicon carbide , ceramic , flexural strength , abrasive , silicon , thermoplastic , raw material , carbon fibers , polymer , machining , composite number , metallurgy , chemistry , organic chemistry
Silicon‐infiltrated silicon carbide (SiSiC) is an important technical ceramic material for several demanding applications such as heat exchangers, nozzles or mechanical seals. However, shaping and machining tools are quickly worn down, due to the application of hard abrasive silicon carbide (SiC) particles as part of the conventional starting compounds for monolithic SiSiC ceramics. Within this work, an alternative route fabricating SiSiC without primary SiC particles and with low residual carbon contents derived from thermoplastic wood polymer composites (WPC) is described. By varying the proportions of the raw materials, the phase compositions of the SiC ceramic could be modified. A reduction in the average wood particle size from 120 to 60 µm led to a homogenous SiSiC with high SiC content. SiSiC with flexural strengths up to 230 MPa and a Weibull modulus of 16 were developed. The residual carbon content could be reduced below 1 wt%.