ZrB2-SiC composites' surface temperature response to dissociated oxygen at 1600 °C

Du, Baihe; Li, Ning; Ke, Bo; Xing, Pifeng; Jin, Xinxin; Hu, Ping; Zhang, Xinghong

doi:10.1016/j.ceramint.2016.06.041

Cited by 6 publications

(1 citation statement)

References 27 publications

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“…Commercially available ZrB 2 powder (d 50 =2.1 µm, purity >99.5%, Northwest Institute for non-ferrous metal research, China), and SiC powder (d 50 =1.4 µm, purity >99.5%, Weifang Kaihua Micro-powder Co. Ltd., China) were used as starting materials. We have described the preparation procedure of ZrB 2 -20 vol.% SiC composites in detail previously [21]. Bulk density and theoretical density were measured by the Archimedes method following ASTM C373-88 and the rule-of-mixture, respectively.…”

Section: Methodsmentioning

confidence: 99%

Influence of surface oxidation on the radiative properties of ZrB2-SiC composites

Xing

et al. 2017

Applied Surface Science

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The spectral emissivities of ZrB 2-20 vol.% SiC composites with various surface components of ZrB 2 /SiC (ZS1), silica-rich glass (ZS2) and porous zirconia (ZS3) were measured using infrared spectrometer in the wavelength range from 2.5 to 25.0 µm. The relationship between surface oxidation (associated with surface component, thickness of oxide scale, testing temperature as well as roughness) and the radiative properties of ZrB 2-SiC composites was investigated systematically. Surface component affected the radiative properties of composites significantly. The total emissivity of ZS1 varied from 0.22 to 0.81 accompanied with surface oxidation in the temperature range 300-900°C. The emissivity of ZS2 was about 1.5 times as that of ZS3 under the same testing conditions. The oxide scale on specimen surface enhanced the radiative properties especially in terms of shortwave range, and the emissivity in the long-wave range gradually increased with the thickness of oxide scale within a certain range. The influence of testing temperature and surface roughness was also investigated. The testing temperature had a little effect on radiative properties, whereas effect of surface roughness could be negligible.

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Section: Methodsmentioning

confidence: 99%