The Dielectric Properties of Nitrides

Freer, Robert; Owate, I. O.

doi:10.1007/978-94-009-2101-6_36

Cited by 13 publications

(19 citation statements)

References 15 publications

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“…A Calphad optimization of Zr-N system was performed by Ma et al [24] using experimental data from Domagala et al [90] for Zr-rich part and enthalpies of formation estimated from ab initio computations. The diagram was reassessed by Sridar et al [91] as part of the modeling of the Ti-Zr-N system using additional thermodynamic data, such as the formation enthalpy of ZrN 1−x [92].…”

Section: Phase Diagramsmentioning

confidence: 99%

“…Carbides and nitrides of Zr and Hf were previously reviewed together with other transition metals in monographs by Goldschmidt [20] and Storms in 1967 [21], Toth in 1971 [22], Pierson in 1996 [23], and in a collection of papers edited by Freer in 1990 [24], Samsonov in 1995 [25], Oyama in 1996 [26], Gogotsi and Andrievski in 1999 [27]. Catalytic properties were reviewed by Levy in 1977 [28] and by Ham and Lee in 2009 [29].…”

Section: Introductionmentioning

confidence: 99%

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Carbides and Nitrides of Zirconium and Hafnium

et al. 2019

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Among transition metal carbides and nitrides, zirconium, and hafnium compounds are the most stable and have the highest melting temperatures. Here we review published data on phases and phase equilibria in Hf-Zr-C-N-O system, from experiment and ab initio computations with focus on rocksalt Zr and Hf carbides and nitrides, their solid solutions and oxygen solubility limits. The systematic experimental studies on phase equilibria and thermodynamics were performed mainly 40–60 years ago, mostly for binary systems of Zr and Hf with C and N. Since then, synthesis of several oxynitrides was reported in the fluorite-derivative type of structures, of orthorhombic and cubic higher nitrides Zr3N4 and Hf3N4. An ever-increasing stream of data is provided by ab initio computations, and one of the testable predictions is that the rocksalt HfC0.75N0.22 phase would have the highest known melting temperature. Experimental data on melting temperatures of hafnium carbonitrides are absent, but minimum in heat capacity and maximum in hardness were reported for Hf(C,N) solid solutions. New methods, such as electrical pulse heating and laser melting, can fill the gaps in experimental data and validate ab initio predictions.

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Section: Phase Diagramsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carbides and Nitrides of Zirconium and Hafnium

et al. 2019

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“…With respect to electrical resistivity, the borides have metallic characteristics, carbides exhibit semiconductor characteristics, and nitrides behave as insulators [6,7].…”

Section: Purpose Of the Researchmentioning

confidence: 99%

“…This kind of electromagnetic window is called a radome, a cone shaped covering on the tip of a missile. Ceramics also possess some optical properties like transparency and translucency that are utilized in the fiber optic industry [7]. The chemical properties of some ceramics enable them to be used as catalysts, inert electrodes for electrometallurgy, and anticorrosive coatings.…”

Section: Potential Uses For the Coupling Of Non-oxide Ceramics And Mementioning

confidence: 99%

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Correlation Studies between Outdoor Exposure and Accelerated Laboratory Corrosion Tests for Galvanic and Non-Galvanic Ceramic-Aluminum Couples

Srinivasan

Hihara

2009

ECS Trans.

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This dissertation is dedicated to Deepika, my wife.ii ACKNOWLEDGEMENTS I would like to express my gratitude and sincere thanks to Dr. Lloyd H. Hihara for his support, endless enthusiasm and encouragement. This dissertation has benefited immensely from his comments, reviews and opinions. I would like to thank him for his time, patience and help. I would also like to thank the dissertation committee -Dr. Ceramics and 6061-T6 Al coupons were coupled together using 6061-T6 Cclamps. Outdoor experiments for 3, 6, and 12-month exposure periods were conducted at eight different test sites, to determine corrosion behavior for various climate and environmental conditions (i.e., rain forest, alpine, marine, volcanic, industrial, agricultural, and arid). Accelerated laboratory experiments include controlled humiditychamber experiments and cyclic corrosion test chamber (CCTC) experiments following modified GM9540P using different chloride-containing solutions. Corrosion rates were v determined at the ceramic-Al interface for the outdoor and accelerated laboratory experiments using weight loss data. Polarization experiments were conducted on 6061-T6Al to study the governing corrosion mechanisms in different chloride solutions. Zeroresistant ammeter (ZRA) studies were conducted between 6061-T6 Al and the conductive ceramics (TiB 2 ) inside a humidity chamber by spraying different chloride solutions in intervals of 24 hours for 5 days to simulate rain and the steady-state galvanic corrosion rates (i Galv ) were observed.

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