<trans-title xml:lang="en">Preparation and Thermal Stability of Ti<sub>3</sub>SiC<sub>2</sub> Ceramics by Polymer Derived Ceramics Method </trans-title>

Bin ZHENG; Kai KANG; Qing ZHANG; Fang YE; Jing XIE; Yan JIA; Guodong SUN; Laifei CHENG

doi:10.15541/jim20240013

Journal of Inorganic Materials, Volume. 39, Issue 6, 733(2024)

Preparation and Thermal Stability of Ti₃SiC₂ Ceramics by Polymer Derived Ceramics Method

Bin ZHENG1... Kai KANG1, Qing ZHANG2, Fang YE2, Jing XIE1, Yan JIA1, Guodong SUN1,* and Laifei CHENG2,* |Show fewer author(s)

Author Affiliations

¹1. School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China

²2. Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi'an 710072, China

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Figures & Tables(17)

1. XRD patterns of Ti₃SiC₂ sintered at different temperatures

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2. SEM images of samples sintered at different temperatures

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3. Thermogravimetric curves of samples from three groups

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4. Relationships of (a) weight gain per unit surface area and (b) weight gain per unit surface area square with time of three groups after oxidation in air at 1300 ℃

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5. SEM images and EDS mappings of the surfaces of three groups

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6. XRD patterns of the oxidized surface of three groups

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7. Changes of Gibbs free energy in oxidation process

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8. SEM images and EDS analyses of cross-sections of three groups

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9. XRD patterns three groups of samples after 30 thermal shocks

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10. Three-point flexural load-displacement curves of samples of three groups after different thermal shock times

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11. Bending strengths of samples from three groups after different thermal shock times

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12. Macro photos of samples of three groups after different thermal shock times

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13. SEM images of a sample from group C after 15 thermal shocks

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Table 1. Mass percentages of phases in samples sintered at different temperatures
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Table 1. Mass percentages of phases in samples sintered at different temperatures
Group TiC/% Ti₅Si₃/% Ti₃SiC₂/%
A 45.58 54.42 0
B 37.16 45.52 17.32
C 7.90 0 92.10
D 47.97 0 52.03

Table 2. Density and porosity of samples sintered at different temperatures
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Table 2. Density and porosity of samples sintered at different temperatures
Group Density/(g·cm^-3) Porosity/%
A 1.77 27.52
B 1.62 22.25
C 1.82 18.47
D 1.69 18.53

Table 3. Air oxidation rate constants of group B-D at 1300 ℃
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Table 3. Air oxidation rate constants of group B-D at 1300 ℃
Group K_p/(kg²·m^-4·h^-1)
B 0.8485
C 0.1636
D 0.4399

Table 4. Material mass change rates after different thermal shocks
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Table 4. Material mass change rates after different thermal shocks
Group Mass change rate/%
15 times 30 times
B 37.95 39.34
C 30.09 30.66
D 35.81 36.91

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Bin ZHENG, Kai KANG, Qing ZHANG, Fang YE, Jing XIE, Yan JIA, Guodong SUN, Laifei CHENG. Preparation and Thermal Stability of Ti₃SiC₂ Ceramics by Polymer Derived Ceramics Method [J]. Journal of Inorganic Materials, 2024, 39(6): 733

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