<trans-title xml:lang="en">Thick SiC Green Bodies: Degreasing Analysis and Pressureless High Density Sintering</trans-title>

Yihua HUANG; Zhengren HUANG; Wenhao SHA; Yabin ZHOU; Zhouxi TAN; Mingkang ZHANG

doi:10.15541/jim20230126

Journal of Inorganic Materials, Volume. 38, Issue 10, 1163(2023)

Thick SiC Green Bodies: Degreasing Analysis and Pressureless High Density Sintering

Yihua HUANG1... Zhengren HUANG1, Wenhao SHA1,2, Yabin ZHOU1, Zhouxi TAN1,2 and Mingkang ZHANG1 |Show fewer author(s)

¹1. State Key Laboratory of High-Performance Ceramics and Ultrastructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

²2. College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China

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Figures & Tables(9)

1. Schematic diagram of sampling of large thickness SiC bulk ceramics (Unit: mm)

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2. Ion current intensity of silicon carbide powder degreasing products tested by TG-MS

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3. Weight loss before and after (incomplete) degreasing of surface (a) and core (b) of large thickness SiC bulk

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4. Changes of formaldehyde (a) and benzene (b) ion current intensity before and after incomplete degreasing

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5. Changes of ion current intensity of dimethyl phenol before and after degreasing and incomplete degreasing

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6. Photo of large thickness bulk SiC ceramics

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7. Microstructures of surface (a) and core (b) of large thickness SiC ceramics

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Table 1. Main pyrolysis products of phenolic resin and their molecular weight

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Table 1. Main pyrolysis products of phenolic resin and their molecular weight

Pyrolysis product	Molecular weight	Result	Pyrolysis product	Molecular weight	Result
Methane	16	Yes	Naphthalene	128	Yes
Acetylene	26	No	Naphthalene trimethylphenol	136	Yes
Carbon monoxide	28	Yes	Methylnaphthalene	142	No
Formaldehyde	30	Yes	Diphenylmethane	168	No
Carbon dioxide	44	Yes	Dibenzofuran	168	No
Benzene	78	Yes	Anthracene	178	No
Toluene	92	Yes	Methyldiphenyl furan	182	No
Phenol	94	Yes	Xanthine	182	No
Xylene	106	Yes	Methylxanthine	196	No
Cresol	108	Yes	Dimethyl xanthine	210	No
Mesitylene	120	Yes	Trimethylxanthine	224	No
Dimethyl phenol	122	Yes

Table 2. Densities before and after degreasing of different parts of large thickness block bulk
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Table 2. Densities before and after degreasing of different parts of large thickness block bulk
Position Density after degreasing/(g·cm^-3) Density before degreasing/(g·cm^-3)
A1 1.84 1.92
A2 1.81 1.86
C3 1.81 1.89
E4 1.83 1.86

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Yihua HUANG, Zhengren HUANG, Wenhao SHA, Yabin ZHOU, Zhouxi TAN, Mingkang ZHANG. Thick SiC Green Bodies: Degreasing Analysis and Pressureless High Density Sintering[J]. Journal of Inorganic Materials, 2023, 38(10): 1163

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