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Preparation method for in-situ synthesis of CNTs-toughened TiB2-based ultra-high-temperature ceramic material
The present invention discloses a preparation method for in-situ synthesis of a CNTs-toughened TiB2-based ultra-high-temperature ceramic material. The method comprises: restoring a MezOy / TiB2 catalyst precursor at the constant temperature to obtain a Me / TiB2 composite catalyst; introducing mixing gas of CH4 and N2 into the Me/TiB2 composite catalyst, so that CNTs is grown on the surface of TiB2 powder of the Me/TiB2 composite catalyst in an in-situ manner to obtain CNTs/TiB2 composite powder; and carrying out spark plasma sintering om the CNTs/TiB2 composite powder to obtain the CNTs-toughened TiB2-based ultra-high-temperature ceramic material. According to the method provided by the present invention, the fracture toughness, the thermal shock resistance and other mechanical properties of the TiB2-based ceramic material can be greatly improved.
Preparation method for in-situ synthesis of CNTs-toughened TiB2-based ultra-high-temperature ceramic material
The present invention discloses a preparation method for in-situ synthesis of a CNTs-toughened TiB2-based ultra-high-temperature ceramic material. The method comprises: restoring a MezOy / TiB2 catalyst precursor at the constant temperature to obtain a Me / TiB2 composite catalyst; introducing mixing gas of CH4 and N2 into the Me/TiB2 composite catalyst, so that CNTs is grown on the surface of TiB2 powder of the Me/TiB2 composite catalyst in an in-situ manner to obtain CNTs/TiB2 composite powder; and carrying out spark plasma sintering om the CNTs/TiB2 composite powder to obtain the CNTs-toughened TiB2-based ultra-high-temperature ceramic material. According to the method provided by the present invention, the fracture toughness, the thermal shock resistance and other mechanical properties of the TiB2-based ceramic material can be greatly improved.
Preparation method for in-situ synthesis of CNTs-toughened TiB2-based ultra-high-temperature ceramic material
LIN JIA (author) / ZHANG HOUAN (author) / HUANG YU (author) / LIAN JIQIONG (author) / YANG YIHANG (author)
2015-12-23
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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