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1.
R. P. Voitovich Yu. V. Naidich G. A. Kolesnichenko 《Powder Metallurgy and Metal Ceramics》1992,31(6):494-497
Translated from Poroshkovaya Metallurgiya, No. 6(354), pp. 40–44, June, 1992. 相似文献
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A test has been devised that allows one to determine the work of adhesion and wettability in a system composed of aluminum nitride ceramics with a liquid metal without the need for experimental examination. A correlation is examined between the work of adhesion on the one hand and that criteria or others on the other that have been proposed by various researchers. Forecasts are made for the work of adhesion and wetting angle for a series of metals that have not been examined previously. An experimental check has been made on the forecast adhesion activity for some elements. 相似文献
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Yu. V. Naidich A. A. Bugaev A. A. Adamovskii V. A. Evdokimov V. P. Umanskii N. S. Zyukin 《Powder Metallurgy and Metal Ceramics》2008,47(3-4):191-196
A new diamond-hard alloy macrocomposite material consisting of diamond grits (0.5–0.8 mm or more in size) and a WC-Co matrix has been developed. The material is characterized by high mechanical properties of the matrix (the same as for WC-Co monolithic hard alloys) while diamonds remain completely intact (no graphitization or dissolution in cobalt melt). This process does not require superhigh pressures. Hard-alloy samples sintered beforehand in conditions that ensure the maximum mechanical properties (1450–1500°C, 30–60 min holding) are used as initial materials. Hollows (cells) or ditches of specific sizes (depth, width) are made in these samples with mechanical or electrophysical methods, and then diamond crystals (grits) commensurate with the hollows, cells, or ditches are placed in them. Vacuum infiltration (brazing) at moderate temperatures (900–1150°C) with adhesion-active alloys (or metallized diamonds) is the final stage in the formation of the composite. Therefore, strong adhesion-mechanical fixation of diamond grits in the hard-alloy matrix is ensured. The new material is efficiently used in diamond bits. 相似文献
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A. V. Durov B. D. Kostjuk A. V. Shevchenko Y. V. Naidich 《Materials Science and Engineering: A》2000,290(1-2)
The method of brazing by capillary impregnation of Cu–Ga melt through a titanium powder layer situated between brazed details is elaborated. Samples of ZrO2 ceramic/metal brazed joints using Cu–Ga–Ti filler and Cu–Sn–Pb–Ti filler were fabricated. The joints’ shear strength was 277±37 MPa for the Cu–Ga–Ti and 156±25 MPa for the Cu–Sn–Pb–Ti. 相似文献
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Alumina and zirconia ceramics joints were made by diffusion bonding through platinum and palladium gaskets in air at temperatures between 1300 and 1550°C. The instrumentation and the procedure for these joints manufacturing are described. The effects of temperature, pressure and exposition time on 3-pt bending strength of resulting joints were established. The maximum bending strength of the samples reached 500 MPa. During thermal resistance testing the samples withstood several hundreds of thermal cycles at temperatures up to 800°C in air. 相似文献
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Naidich Yu. V. Adamovsky A. A. Zhuravlev V. S. Zyukin N. S. 《Powder Metallurgy and Metal Ceramics》2019,58(7-8):485-491
Powder Metallurgy and Metal Ceramics - The wetting of superhard materials produced from cubic boron nitride and chemical vapor deposition diamond with metallic fillers is studied. The filler... 相似文献