Carbon-Dispersed WC–FeAl Hard Material Fabricated by Mechanical Milling and Subsequent Pulsed Current Sintering

Carbon-Dispersed WCFeAl Hard Material Fabricated by Mechanical Milling and Subsequent Pulsed Current Sintering

A new metal mold material for pulsed current sintering (PCS) methods at high temperatures with higher electrical resistivity than cemented carbide molds, was fabricated using mechanical milling and PCS. The constituent (100 1 x)(WC­10 or 30FeAl) + xC (x = 0­8; mass%) hard material with dispersed spherical carbon particles were synthesized via mechanical milling of the source powders and PCS. Th...

Fabrication of Nanostructured Cu matrix Nanocomposites by High Energy Mechanical Milling and Spark Plasma Sintering

Spark plasma sintering (SPS) is a sintering process that is capable of sintering hard worked powders in short times. This technique was used to fabricate bulk Cu and Cu-SiC nanocomposites. Pure Cu and mixed powders of Cu including 4 vol% of SiC nanoparticles were mechanically alloyed for 25 h and sintered at 750˚C under vacuum condition by SPS method. Microstructures of the materials were chara...

Multifunctional carbon nanoelectrodes fabricated by focused ion beam milling.

We report a strategy for fabrication of sub-micron, multifunctional carbon electrodes and application of these electrodes as probes for scanning electrochemical microscopy (SECM) and scanning ion conductance microscopy (SICM). The fabrication process utilized chemical vapor deposition of parylene, followed by thermal pyrolysis to form conductive carbon and then further deposition of parylene to...

Accuracy evaluation of metal copings fabricated by computer-aided milling and direct metal laser sintering systems

PURPOSE To assess the marginal and internal gaps of the copings fabricated by computer-aided milling and direct metal laser sintering (DMLS) systems in comparison to casting method. MATERIALS AND METHODS Ten metal copings were fabricated by casting, computer-aided milling, and DMLS. Seven mesiodistal and labiolingual positions were then measured, and each of these were divided into the catego...

Sintering and Heat Treatment of Titanium Alloys by Pulsed Electric Current Sintering