Journal ArticleDOI
Si3N4 and Si2N2O for high performance radomes
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TLDR
Si3N4 is a suitable material for high temperature radome applications because of its good thermomechanical and dielectric properties The process parameters employed in pressureless sintering to obtain high density material were investigated as discussed by the authors.About:
This article is published in Materials Science and Engineering.The article was published on 1985-05-01. It has received 117 citations till now. The article focuses on the topics: Dielectric & Dielectric loss.read more
Citations
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Electromagnetic properties of Si–C–N based ceramics and composites
TL;DR: Besides the excellent high-temperature mechanical properties, Si3N4 and SiC based ceramics containing insulating or electrically conductive phase are attractive for their tunable dielectric propert...
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Hot Isostatic Press Sintering and Properties of Silicon Nitride without Additives
TL;DR: In this article, the sintering process of highly pure powder was investigated with special interest in the evolution of α-β phase transformation, densification, and microstructure development, and it was observed that the transformation occurred without a liquid phase below 1730°C, which corresponds to the melting point of SiO2.
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Resilient Si3N4 Nanobelt Aerogel as Fire-Resistant and Electromagnetic Wave-Transparent Thermal Insulator.
TL;DR: In this paper, the α-Si3N4 NBA realized resilient compressibility (with a recoverable strain of 40-80%), fire resistance (1200 °C butane blow torch), thermal insulation (0.029 W m-1 K-1), and electronic wave transparency (a dielectric constant of 1-1.04 and a dielectoric loss of 0.001-0.004) in one material, which makes it a promising candidate for mechanical energy dissipative, fire-resistant, and e cient thermal insulator to be applied in extreme conditions.
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Mechanical and dielectric properties of porous Si3N4-SiO2 composite ceramics
TL;DR: In this article, a novel process combining oxidation-bonding with sol-gel infiltration-sintering was developed to fabricate a porous Si 3 N 4 -SiO 2 composite ceramic.
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Brazing TC4 alloy to Si3N4 ceramic using nano-Si3N4 reinforced AgCu composite filler
TL;DR: In this article, a particle reinforced AgCu composite filler (abbreviated as AgCuC filler) was developed by introducing nano-Si3N4 particles and micron-Ti particles into AgCu powder filler.
References
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Journal ArticleDOI
Pressureless sintering of Si3N4
G. R. Terwilliger,F. F. Lange +1 more
TL;DR: In this paper, the authors investigated the shrinkage by a liquid phase mechanism and bulk decomposition are two countervailing processes in the sintering of Si3N4 powder with the addition of 5 wt % MgO.
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Mechanical Properties of Hot‐Pressed Silicon Nitride with Different Grain Structures
TL;DR: In this paper, during hot-pressing of α-Si3N4 powders, the equiaxed α micro-structure gradually transforms into a β structure characterized by needle-shaped prismatic grains which are closely entangled and linked together.
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Hot-Pressing Behavior of Si3N4
G. R. Terwilliger,F. F. Lange +1 more
TL;DR: In this paper, the densification behavior of Si3N4 containing MgO was studied in detail and it was concluded that MgOs form a liquid phase (most likely a magnesium silicate).
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Phase Relations in the System Si3N4‐SiO2‐MgO and Their Interrelation with Strength and Oxidation
TL;DR: In this paper, phase relation studies of Si3N1, SiO2, and MgO have established three important subsolidus tie lines for nonoxidizing fabrication conditions.
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Silicon oxynitride stability.
W. R. Ryall,Arnulf Muan +1 more
TL;DR: Equilibrium measurements are reported which provide information on the approximate ratios of pressures of oxygen to nitrogen required for existence of this phase under equilibrium conditions at elevated temperatures.