Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Hafnium diboride-tantalum disilicide composite powder and preparation method thereof
The invention provides hafnium diboride-tantalum disilicide composite powder and a preparation method thereof, and belongs to the technical field of composite powder materials. The hafnium diboride-tantalum disilicide composite powder provided by the invention is in a molten eutectic state and comprises hafnium diboride and tantalum disilicide at mass ratio of (2-11): 1. Tantalum disilicide is used as a modification component of hafnium diboride. On one hand, a high-temperature oxidation product SiO2 of tantalum disilicide can be used as a good high-temperature sealing and filling phase to fill holes of a hafnium diboride coating. On the other hand, another high-temperature oxidation product Ta2O5 of tantalum disilicide can be subjected to a solid solution reaction with HfO2 to form HfTaOx, so that the crystal transformation of HfO2 is inhibited to a certain extent, and the high-temperature thermal stability of the powder is improved. Therefore, the hafnium diboride-tantalum disilicide composite powder provided by the invention has good high-temperature oxidation and ablation resistance.
本发明提供了一种二硼化铪‑二硅化钽复合粉体及其制备方法，属于复合粉体材料技术领域。本发明提供的二硼化铪‑二硅化钽复合粉体为熔融共晶态，成分包括二硼化铪与二硅化钽，所述二硼化铪与二硅化钽的质量比为2～11:1。本发明使用二硅化钽作为二硼化铪的改性成分，一方面，二硅化钽的高温氧化产物SiO2能够作为很好高温封填相，对二硼化铪涂层的孔洞缺陷进行封填；另一方面，二硅化钽的另一高温氧化产物Ta2O5能够与HfO2发生固溶反应形成HfTaOx，一定程度抑制了HfO2的晶型转变，提升了该粉体的高温热稳定性。因此，本发明提供的二硼化铪‑二硅化钽复合粉体具有良好的高温抗氧化烧蚀特性。
Hafnium diboride-tantalum disilicide composite powder and preparation method thereof
The invention provides hafnium diboride-tantalum disilicide composite powder and a preparation method thereof, and belongs to the technical field of composite powder materials. The hafnium diboride-tantalum disilicide composite powder provided by the invention is in a molten eutectic state and comprises hafnium diboride and tantalum disilicide at mass ratio of (2-11): 1. Tantalum disilicide is used as a modification component of hafnium diboride. On one hand, a high-temperature oxidation product SiO2 of tantalum disilicide can be used as a good high-temperature sealing and filling phase to fill holes of a hafnium diboride coating. On the other hand, another high-temperature oxidation product Ta2O5 of tantalum disilicide can be subjected to a solid solution reaction with HfO2 to form HfTaOx, so that the crystal transformation of HfO2 is inhibited to a certain extent, and the high-temperature thermal stability of the powder is improved. Therefore, the hafnium diboride-tantalum disilicide composite powder provided by the invention has good high-temperature oxidation and ablation resistance.
本发明提供了一种二硼化铪‑二硅化钽复合粉体及其制备方法，属于复合粉体材料技术领域。本发明提供的二硼化铪‑二硅化钽复合粉体为熔融共晶态，成分包括二硼化铪与二硅化钽，所述二硼化铪与二硅化钽的质量比为2～11:1。本发明使用二硅化钽作为二硼化铪的改性成分，一方面，二硅化钽的高温氧化产物SiO2能够作为很好高温封填相，对二硼化铪涂层的孔洞缺陷进行封填；另一方面，二硅化钽的另一高温氧化产物Ta2O5能够与HfO2发生固溶反应形成HfTaOx，一定程度抑制了HfO2的晶型转变，提升了该粉体的高温热稳定性。因此，本发明提供的二硼化铪‑二硅化钽复合粉体具有良好的高温抗氧化烧蚀特性。
Hafnium diboride-tantalum disilicide composite powder and preparation method thereof
一种二硼化铪-二硅化钽复合粉体及其制备方法
LIU YANBO (Autor:in) / XIE MINGSHAO (Autor:in) / LIU SHAOPU (Autor:in) / WANG YIFAN (Autor:in)
04.01.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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