Chromium carbide-based cermets are suitable for use in abrasive and corrosive environments. This work presents the fabrication of chromium by a very fast sintering process: Electric Resistance Sintering. The thermal cycle duration was less than 1 s without protective atmosphere. Two different compositions were studied: Cr3C2-25NiCr (wt%) WC-20Cr3C2-7Ni (wt%). Microstructure crystallographic pha...

This paper deals with production of hard metal by powder metallurgy and its effect on the environment. Hard is a composite material that consists tungsten carbide as refractory phase cobalt or nickel soft binder phase. It cannot be produced classical casting technology. Owing to excellent properties, such high hardness, wear heat resistance etc., can applied in variety industrial fields. Powder...

The use of a low-temperature plasma for the synthesis amorphous silicon carbonitride (SiCN) nanoparticles enables realization sintered bulk samples with high thermal stability. Amorphous SiCN are produced from mixture silane, methane, and ammonia utilizing mid-pressure, radio-frequency, continuous flow reactor. Particle characterization shows that largely some crystalline carbide domains <10 nm...

Bone apatite contains carbonate and is therefore not pure hydroxyapatite. We have successfully developed sintered carbonate apatite (CA) with a concentration of carbonate of 6 weight% and have evaluated its osteoconductive and bioresorption characteristics. Cylindrical porous sintered CA and sintered hydroxyapatite (HA) measuring 4 x 4 mm with a porosity of 20% were implanted into surgically-cr...

Titanium carbide is used as an attractive reinforcement to produce particulate metal matrix composites. One of the problems to use this carbide as a reinforcement in copper-based composites is the lack of wetability in Cu-TiC system. This property improves as the C/Ti ratio in carbide decreases. Problems to use this carbide as a reinforcement in copper-based composites is the lack of wetabiity...

The purpose of this study is to evaluate the fitting accuracy and fracture resistance of crowns using a hybrid zirconia frame made of both porous and dense zirconia. Commercial semi-sintered zirconia, sintered dense zirconia and sintered hybrid zirconia were used. Sintered zirconia was milled using the CAD/CAM system, and semi-sintered zirconia was milled and sintered to fabricate molar crown f...

This paper reports a route to suppress the grain growth in silicon carbide (SiC) during its sintering by combining it with polysilazane (PSZ). SiC was mixed PSZ 1:1 weight ratio and sintered at 1600, 1700, 1800 °C hot-pressing furnace. A satisfactory density obtained temperatures &gt; 1600 °C. The sizes of SiC/PSZ composites 1700 were 112 125 nm, respectively. shape composite circular mainly si...

This paper describes thermoelectric properties of La-doped SrTiO3 prepared by using a combination of combustion synthesis (CS) with post spark plasma sintering (SPS), on which effects of sintering temperature were mainly examined. In experimental, combustion-synthesized (CSed) samples (Sr1 xLaxTiO3, x 1⁄4 0:08) were spark-plasma-sintered (SPSed) at temperatures from 1513 to 1663K and the thermo...

The healing process after implantation of sintered bone in the rat parietal bone was compared with that of synthetic hydroxyapatite using both scanning electron and light microscopy. The results showed that the differences between the sintered natural bone and the synthetic hydroxyapatite implantations were in the states of bone union and the bioresorbability of the implanted materials, even th...