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In the industrial world, brittle materials include the range of cemented tungsten carbide grades, the entire family of advanced ceramics—including silicon carbide, silicon nitride, aluminum oxide, zirconia and zirconiatoughened alumina, boron carbide and others

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Boron Carbide Aluminum Nitride Boron Nitride α-Silicon Carbide Silicon Nitride Zirconium Oxide Al 2 O 3 92 Al 2 O 3 99.7 Al 2 O 3 99.8 Sapphire / Ruby Bl 4l C AlN BN SiC Si 3 N 4 ZrO 2 TZP ZrO 2 PSZ Young’s modulus GPa 310 390 406 426 / 462 450 168 22

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Prolonged and rapid thermal annealing of boron implanted silicon. Peter, C. R.; de Souza, J. P.; Hasenack, C. M. // Journal of Applied Physics;9/1/1988, Vol. 64 Issue 5, p2696 Presents a study which examined prolonged and rapid thermal annealing of boron

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Gas pressure sintered silicon nitride (GPSSN) is a sintering processing at high temperature after isostatic pressing of silicon nitride powder with other additives. The nitrogen pressure (<20mpa) during sintering could restrain the dissociation of si3n4 and get the full sintering at high temperature, which make the silicon nitride products to highest density and lowest porosity.

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2020/8/6· Boron carbide (B 4 C) has higher hardness than alumina or silicon carbide. Its oxidation product (B 2 O 3 ) provides a protective skin at high temperatures (> 800 o C). Because of its high hardness and wear resistance, boron carbide is applied in low-temperature appliions such as grinding wheel dressers, and abrasive blast or water jet nozzles.

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Japanese researchers claim to have reduced the nuer of disloions in silicon carbide crystals by two to three orders of magnitude (Nature, August 26, 2004). "These substrates will promote the development of high-power SiC devices and reduce energy …

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Ceramics Science and Technology, Volume 2: Materials …

Although ceramics have been known to mankind literally for millennia, research has never ceased. Apart from the classic uses as a bulk material in pottery, construction, and decoration, the latter half of the twentieth century saw an explosive growth of appliion fields, such as electrical and thermal insulators, wear-resistant bearings, surface coatings, lightweight armour, or aerospace

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Evidence for lithium and boron from star-forming regions …

We report the first measurements of lithium and boron isotope ratios and abundances measured in "gently separated" presolar SiC grains. Almost all analyses of presolar SiC grains since their first isolation in 1987 have been obtained from grains that were separated from their …

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