High Temperature Ceramifying Behavior of SR/Al2O3 Composites

Yuan Lu Xiong; Qiang Shen; Fei Chen; Jin Zheng; Lian Meng Zhang

doi:10.4028/www.scientific.net/AMR.105-106.168

Paper Titles

Application of ANN Back-Propagation for Residual Stress in an Alloy Reinforced Ceramics/Metal Composite
p.154

Thermal Fatigue Behavior of Ladle Purging Plug
p.158

High Temperature Oxidation Behavior of ZrB₂-SiC-Graphite Composite Heated by High Electric Current
p.162

Oxidation Properties of ZrB₂-20vol.%SiC-10vol.%BN Ceramic Composite at 1200°C
p.165

High Temperature Ceramifying Behavior of SR/Al₂O₃ Composites
p.168

Thermal Conductivity and Mechanical Property of Si₃N₄ Ceramics Sintered with CeF₃/LaF₃ Additives
p.171

Wear Resistance of Nano-ZrO₂ Ceramic for Hip Joint Head Prostheses
p.175

Oxidation Behaviors of TiB₂-TiC_X and TiB₂-TiC_X/15SiC Ceramics
p.179

Hot-Pressing Sintering Behavior and Properties of AlON/SiC Composites
p.184

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High Temperature Ceramifying Behavior of SR/Al₂O₃ Composites

Abstract:

In this work, silicone/alumina composites with 33 wt.% silicone content are prepared by compression mould technique. TGA, XRD and SEM were used to characterize the ceramifying behavior when the samples were heated from 600 to 1600°C. XRD results suggest that the ceramic residue of SR could restrain the phase transformation of γ-Al2O3 below 1100°C, indicating that the chemical bonds preserve the mechanism strength of SR/Al2O3 composites under high temperature. The flexural strength increases from 18.19 MPa to 75.31 MPa with the increasing temperature from 600 to 1600°C, owing to the sintering reaction between SiO2 and Al2O3 forming mullite phase under higher temperature. It has low liner shrinkage after firing and nearly no macrocracks or deformation under any temperature, illustrating that the SR/Al2O3 composites can be used as organic fire-retardancy materials.