Porous Materials with Hybrid Structure Produced by Nitriding Partially-Sintered Silicon

Makoto Nanko

doi:10.4028/www.scientific.net/MSF.620-622.765

Paper Titles

Research on Physical and Mechanic Properties of Green-Growing Porous Concrete for Ecological Slope Protection
p.749

Porous Silicon Nitride Ceramics Prepared by Reduction – Nitridation of Diatomite
p.753

Structure Change and Improvement of the Mechanical Properties of Lotus-Type Porous Copper by ECAE Process
p.757

Fabrication and Properties of Pressureless Sintered Si₃N₄/BN Composite Ceramics with La₂O₃-Al₂O₃-Y₂O₃ as Sintering Additives
p.761

Porous Materials with Hybrid Structure Produced by Nitriding Partially-Sintered Silicon
p.765

Abrasive Grain Efficiency and Surface Roughness in Machining Magnesium Alloys by Newly Developed Cup-Type Diamond-Grinding-Wheels
p.769

A Novel Method for the Preparation of Porous SiC
p.773

Fabrication of Clay Foam Ceramics Using Silicon Carbide and Ferric Oxide as Foaming Agents
p.777

Mechanical Behaviour of High Density Polyethylene Based Foams
p.781

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Porous Materials with Hybrid Structure Produced by Nitriding Partially-Sintered Silicon

Abstract:

New porous materials with hybrid pore structure “Fibers-In-Pores” structure were produced by developing Si3N4 whiskers in pores of partially-sintered silicon by nitriding. Because silicon and Si3N4 have excellent heat resistance, the proposed porous materials are expected to utilize high-temperature applications such as gas filters. Porous silicon was produced by sintering Si powder at 1300°C for 1 h in a stream of Ar gas. Porous Si bodies were nitrided at 1300°C for 1 h with N2 gas to develop long Si3N4 whiskers in pores of partially-sintered silicon. Specific surface area was increased and gas permeability was decreased by applying the nitridation process at 1300°C.