TY - JOUR
T1 - Oxidation resistance and infrared emissivity of MoSi2@SiO2 particles prepared via TEOS hydrolysis self-assembly method
AU - Chen, Yuejun
AU - Zhu, Shizhen
AU - Ji, Yanqi
AU - Ma, Zhuang
AU - Wei, Hengyong
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/11/25
Y1 - 2019/11/25
N2 - In order to avoid infrared emissivity deterioration of MoSi2 particles result from its high-temperature oxidation, a satisfactory electrostatic self-assembly process was presented to synthesize MoSi2@SiO2 particles. A thermally stable and transmitting infrared SiO2 shell was formed with tetraethyl orthosilicate (TEOS) as a precursor and tetrabutyl ammonium bromide (TBAB) as an electrostatic adsorbent after heat treatment at 1200 °C. The oxidation resistance, composition, micro-morphology and infrared emissivity of MoSi2@SiO2 were studied using thermogravimetric analysis, X-ray diffraction, energy disperse spectroscopy, scanning electron microscopy, and ultraviolet–visible near-IR spectrophotometer. The results demonstrated that MoSi2 particle was thoroughly encapsulated by a SiO2 glass shell, consequently, it exhibited great oxidation resistance compared with that of unencapsulated. More importantly, the emissivity of MoSi2@SiO2 particles had no obvious recession due to the intact encapsulation with TBAB. In addition, the electrostatic self-assembly mechanism of core-shell (MoSi2@SiO2) particles was discussed.
AB - In order to avoid infrared emissivity deterioration of MoSi2 particles result from its high-temperature oxidation, a satisfactory electrostatic self-assembly process was presented to synthesize MoSi2@SiO2 particles. A thermally stable and transmitting infrared SiO2 shell was formed with tetraethyl orthosilicate (TEOS) as a precursor and tetrabutyl ammonium bromide (TBAB) as an electrostatic adsorbent after heat treatment at 1200 °C. The oxidation resistance, composition, micro-morphology and infrared emissivity of MoSi2@SiO2 were studied using thermogravimetric analysis, X-ray diffraction, energy disperse spectroscopy, scanning electron microscopy, and ultraviolet–visible near-IR spectrophotometer. The results demonstrated that MoSi2 particle was thoroughly encapsulated by a SiO2 glass shell, consequently, it exhibited great oxidation resistance compared with that of unencapsulated. More importantly, the emissivity of MoSi2@SiO2 particles had no obvious recession due to the intact encapsulation with TBAB. In addition, the electrostatic self-assembly mechanism of core-shell (MoSi2@SiO2) particles was discussed.
KW - High emissivity
KW - MoSi@SiO
KW - Oxidation resistance
KW - Self-assembly
KW - Thermal protection coating
UR - https://www.scopus.com/pages/publications/85070934279
U2 - 10.1016/j.jallcom.2019.151745
DO - 10.1016/j.jallcom.2019.151745
M3 - Article
AN - SCOPUS:85070934279
SN - 0925-8388
VL - 810
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 151745
ER -