Carbon Foams with High Compressive Strength Derived from Mixtures of Mesophase Pitch and Si Particles

Yang Wei Wang; Zhi Jin Zhang; Xiao Dong Yu; Fu Chi Wang; Kai Li; Zhi Qiang Luan

doi:10.4028/www.scientific.net/AMR.97-101.1130

Paper Titles

Equal Channel Angular Pressing and Torsion of Pure Al Powder in Tubes
p.1109

An Experimental Study of Metal Co-Injection Molding with Sequential Injection
p.1116

Creep Damage Analysis of Powder Metallurgy Material with Inclusion
p.1120

Preparation and Mechanical Properties of Al₂O₃/TiCN Sandwich Nanocomposite Ceramic Tool Materials
p.1126

Carbon Foams with High Compressive Strength Derived from Mixtures of Mesophase Pitch and Si Particles
p.1130

Study on Friction Properties of Cu-Based Friction Materials with Ni Coated Nano-SiO₂ Particles
p.1134

Synthesis of α-Al₂O₃ Platelets in Molten Salt for High Performance Ceramics
p.1138

Synthesis of High Nitrogen Stainless Steel Powders by High Energy Ball Milling and their SPS Compaction
p.1142

System Design for High Energy Rate Electromagnetic Powder Compaction Devices
p.1146

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 97-101Carbon Foams with High Compressive Strength...

Carbon Foams with High Compressive Strength Derived from Mixtures of Mesophase Pitch and Si Particles

Abstract:

Carbon foam with relatively high compressive strength and high porosity was prepared from a mixture of mesophase pitch and Si particles by foaming and carbonization. The influence of Si content on the microstructures and properties of the carbon foam was studied. Results show that the pore number decreases and the strut thickness increases with an increasing of Si content. In addition, bulk density also increases with increasing Si content but the porosity decreases. Si addition to the mesophase pitch reduces the number of microcracks on the cell wall of the carbon foam remarkably which results in an increase of compressive strength for the carbon foams. Compressive strengths improve by 46%, 176% and 339% at Si additions of 30%, 40% and 50% (wt %), respectively. Carbon foam with a relatively high compressive strength of 24.6 MPa and a porosity of 61% are obtained when 50 wt% Si is added.