منابع مشابه
INFLUENCE OF Si-POWDER CHARACTERISTICS ON THE PORE STRUCTURE OF Si-POWDER COMPACTS AND OF REACTION-BONDED Si3N4
In order to achieve a homogeneous starting material for the production of dense Si3N4 by post-sintering of RBSN, the morphological and chemical characteristics of the Si-starting powders as well as the pore structure of the Si-powder compacts have to be optimized. In this context, the influence of the grain size distribution on the micropore size distribution of the Sipowder compacts was determ...
متن کاملSurface Treatment of Powder Metallurgical Compacts
Introduction Powder metallurgy (p/M) is a rapidly expanding technology for manufacturing of structural parts. The PA4 process provides economical as well as technical benefits over conventional processing of wrought material. It is possible to fabricate high quality, complex parts to close tolerances without machining. The energy consumption is low and the material utilisation and productivity ...
متن کاملMagnetoresistance of Chromium Dioxide Powder Compacts
Cold-pressed powders of the half-metallic ferromagnet CrO2 are dielectric granular metals. Hysteretic magnetoresistance with maxima at the coercive field arises from interparticle contacts. Dilution with insulating antiferromagnetic Cr2O3 powder reduces the conductivity by 3 orders of magnitude, but enhances the magnetoresistance ratio which reaches 50% at 5K. The negative magnetoresistance is ...
متن کاملSintering and Foaming of Barium Silicate Glass Powder Compacts
The manufacture of sintered glasses and glass-ceramics, glass matrix composites, and glass-bounded ceramics or pastes is often affected by gas bubble formation. Against this background, we studied sintering and foaming of barium silicate glass powders used as SOFC sealants using different powder milling procedures. Sintering was measured by means of heating microscopy backed up by XPD, differen...
متن کاملLubricant Pyrolysis During Sintering of Powder Metallurgy Compacts
The chemistry surrounding the pyrolysis of N,NЈ-ethylenebisstearimide (EBS) compacted with iron powder is described for the first time. Heat treatment is carried out in a 5 vol pct hydrogen atmosphere (balance nitrogen) over the 100 °C to 850 °C range. The exhaust from the furnace is monitored by Fourier transform infrared and dispersive ultraviolet absorption spectroscopy; condensable material...
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ژورنال
عنوان ژورنال: Journal of the Society of Materials Science, Japan
سال: 1965
ISSN: 1880-7488,0514-5163
DOI: 10.2472/jsms.14.759