Silicon infiltrated silicon carbide from extruded thermoplastic wood polymer composites. Issue 1 (24th October 2019)

• Record Type: Journal Article
• Authors: Liensdorf, Tom; Schoch, Rebecca; Lang, Marieluise; Langhof, Nico; Hochrein, Thomas; Bastian, Martin; Krenkel, Walter
• Other Names: Berto Arnaldo Moreno guestEditor.
• Is Part Of: International journal of applied ceramic technology. Volume 17:Issue 1(2020)
• Page Start: 3
• Page End: 10
• Publication Date: 2019-10-24
• Subjects: ceramic engineering -- green body -- pyrolysis -- reaction bonding -- silicon carbide -- wood polymer composites (WPC); Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.13404
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract: 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%.