Investigation of the oxidation of a carbon-ceramic composite with infrared reflection spectroscopy

Takase, Akira; Yoshida, Hisayoshi; Yamamoto, T.

doi:10.1007/bf00721099

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…The raw materials used in this stud from Zouza member in far north terials were all recognized as ri | 9 MANOCHA et Al. 3 and 4, respectively.…”

Section: Raw Materialsmentioning

confidence: 99%

“…They explained the mechanism for the formation of silicon carbide based on the reaction between silicon and carbon derived from phenolic resin. Yoshida et al 9 investigated the oxidation of carbon–ceramic composites with infrared reflection spectroscopy. They showed that glasses are formed on the surface of the composites during oxidation and are considered to inhibit the oxidation of the composites.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of carbon–silicon carbide particulate composites by powder metallurgical route

Manocha

Prasad

Manocha

2021

Int J Applied Ceramic Tech

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Carbon and graphite materials have remarkable characteristics of withstanding high temperatures up to 3000°C in protective environment, good thermal shock resistance, low coefficient of thermal expansion, good thermal and electrical conductivities, low density, etc. These properties make them strong candidates to be used in general high temperature engineering applications. 1,2 However, there are disadvantages such as low strength as compared to various ceramic materials and their limited use in an oxidizing atmosphere above 450°C. Carbon and Graphite materials have low friction values as well. Various techniques have been tried to overcome these problems. These are coating the carbon surface with borates or borosilicates or incorporating different carbides into carbon materials which can increase the oxidation resistance temperature to about 900-1000°C and also decrease wear. 3--6 The development of carbon-ceramic particulate composites is another way to overcome these disadvantages. The incorporation of different ceramics into carbon results in significant improvement in mechanical properties, especially hardness and bending strength, in addition to enhancement of oxidation resistance of the carbon-ceramic composites. 7 Many efforts have been made to prepare carbon-ceramic composites with silicon powder and phenolic resin as carbon precursor. Tang et al 8 reported a three-step process in which silicon powder and phenolic resin were used as raw materials to fabricate silicon carbide powder via coat-mix process. They obtained silicon carbide powders of particle size varying from 0.1 to 0.4 μm with mean particle size of

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“…The raw materials used in this stud from Zouza member in far north terials were all recognized as ri | 9 MANOCHA et Al. 3 and 4, respectively.…”

Section: Raw Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of carbon–silicon carbide particulate composites by powder metallurgical route

Manocha

Prasad

Manocha

2021

Int J Applied Ceramic Tech

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“…Surface applications include following photochemical changes of bulk and polymer coated metal and metal oxide interfaces (29). oxidation degradation of the surface layer of a composite sample (30). and evaluation of degradation and reactions at metal polymer interfaces due to environmental factors.…”

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confidence: 99%

Nondestructive Evaluation of Aging in Cotton Textiles by Fourier Transform Reflection—Absorption Infrared Spectroscopy

Cardamone

1989

ACS Symposium Series

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Specular Reflectance FTIR has been used to follow the chemical changes in cellulose when cotton cloth was aged for 2, 4, 7, 11, 14, 23, and 31 hours at 190°C in air and in nitrogen. The infrared absorptions of carbonyl and carboxylate groups were measured from the 1600-1750 cm-1 region. After 31 hours of aging in air and in nitrogen, the extent of carboxylate formation was approximately the same although oxidation proceeded more rapidly in air. The rate of aging in nitrogen proceeded at a uniform rate over 31 hours whereas in air, a leveling off point was reached after 11 hours. The dependence of the formation of carboxylate on the accessibility of OH groups is discussed. These results indicate the exceptional use of Specular Reflectance absorbance infrared spectroscopy for rapid, sensitive, and nondestructive detection of oxidation degradation in cotton textiles. The aging of cellulosic textiles includes a complex set of reactions involving oxidation, hydrolysis, crosslinking. and chain scission.(1-3) Slow degradation at room temperature is cumulative and can be followed by a chemical change in the cellulose structure or by a physical change in some measured parameter. Often artificial heat-aging is used to simulate the natural aging process assuming that similar changes occur.(4-7) These changes from thermal aging in air. in nitrogen, or in vacuo affect cellulose structural morphology, chemical accessibility, and the extent of degradation. (8-11) General Infrared Spectroscopy BackgroundInfrared spectroscopy is recognized as a universal instrumental method for analyzing changes in chemical structure. (12-13) There are a variety of infrared techniques which include Transmission.

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Investigation of the oxidation of sialons with infrared reflection spectroscopy

Takase¹

1986

J Mater Sci

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Investigation of the oxidation of a carbon-ceramic composite with infrared reflection spectroscopy

Cited by 3 publications

References 7 publications

Synthesis and characterization of carbon–silicon carbide particulate composites by powder metallurgical route

Synthesis and characterization of carbon–silicon carbide particulate composites by powder metallurgical route

Nondestructive Evaluation of Aging in Cotton Textiles by Fourier Transform Reflection—Absorption Infrared Spectroscopy

Investigation of the oxidation of sialons with infrared reflection spectroscopy

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