نتایج جستجو برای: sintered carbide

تعداد نتایج: 14914  

Journal: :NOVYE OGNEUPORY (NEW REFRACTORIES) 2018

Journal: :Journal of the Japan Society of Powder and Powder Metallurgy 1987

S. Moradi Ghiassabadi, S. Niksirat, SH. Raygan,

In this research, two different carbonaceous materials (Graphite:G and Petrocoke:P) were separately compared in terms of the carbothermic reduction of hematite and anatase in order to synthesize Fe-TiC nanocrystalline composite by mechanically activated sintering method. Powders were activated in a planetary high-energy ball mill under argon atmosphere for 0, 2, 5, ...

2016
J. Pelletier

Within the scope of increase in cutting tools efficiency, a CW CO;! laser beam has been used for butt welding sintered tips containing cobalt and tungsten carbide to a medium carbon steel core. After optimization of the laser processing conditions, full penetrating, sound and homogeneous welds are observed. Hardness is found to be nearly constant across the entire weld bead cross-section. Micro...

2002
George D. Quinn Parimal J. Patel Isabel Lloyd

The world standards for conventional ceramic hardness have varying requirements for control of loading rate during the indentation cycle. A literature review suggests that loading rate may affect measured hardness in some instances. In view of the uncertainty over this issue, new experiments over a range of indentation loading rates were performed on a steel, sintered silicon carbide, and an al...

Journal: :Journal of the Japan Society for Precision Engineering 1998

2012
Olga García-Moreno Adolfo Fernández Ramón Torrecillas

Very low thermal expansion materials have been developed in a wide temperature range from -150 oC to 450 oC. These very low expansion materials are composed of a lithium aluminosilicate matrix with dispersed silicon carbide nanoparticles. The nSiC content in the most stable composite has resulted to be 27 vol.%. Powder processing and sintering temperature control have been found to be of key im...

Journal: :Bulletin of the Japan Institute of Metals 1988

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