The Compressibility Behaviour of a New Generation of Coated Metal/Ceramic Composite Powders

Jana Bidulská; Tibor Kvačkaj; Marco Actis Grande; Róbert Bidulský

doi:10.4028/www.scientific.net/KEM.409.362

Paper Titles

Influence of Microstructure on Mechanical Response of Silicon Nitride Ceramic Composites in Nano-, Micro- and Macro-Volume of Material
p.346

Strength Degradation Flaws in the Liquid-Phase-Sintered SiC Based Ceramics
p.350

Observation of Thermophysical and Tribological Properties of CNT Reinforced Si₃N₄
p.354

Low Temperature Failure of Fe₇₆Ni₂Si₉B₁₃ Compacted from Amorphous Glass Powder
p.358

The Compressibility Behaviour of a New Generation of Coated Metal/Ceramic Composite Powders
p.362

Impedance Changes and Carbon Stability during the Heat Treatment of Si₃N₄–Carbon Composites
p.365

The Milling Time Effect on Sintering Kinetics of Silicon Nitride Based Composites
p.369

Creep of FINEMET Alloy at Amorphous to Nanocrystalline Transition
p.373

Fracture Toughness of Si₃N₄ Based Ceramics with Rare-Earth Oxide Sintering Additives
p.377

HomeKey Engineering MaterialsKey Engineering Materials Vol. 409The Compressibility Behaviour of a New Generation...

The Compressibility Behaviour of a New Generation of Coated Metal/Ceramic Composite Powders

Abstract:

The present work deals with the compressibility behaviour of a new generation of coated metal/ceramic composite powders. A commercial 316L stainless steel powder was coated with the alumina layer by an aqueous sol-gel colloidal process and then metal/ceramic composite materials were produced with core/shell structure. The powders were uniaxially cold pressed in a cylindrical die in the range from 200 to 1000 MPa. In order to reach the best green density, composite powders have been added with 1% in weight of lubricant. The compressibility behaviour was analysed using the equation P = P0.exp (-K.pn). P0 is the relative apparent density and p is applied pressure; K and n are the parameters with defined physic-metallurgical substance. The values of the parameters K and n were determined by regression analyses. The correlation coefficients r of experimental compaction curves were up to 0.98. The results showed that difference between metal/alumina weight ratios affected the compressibility parameters as well as compressibility curves.