Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method for B4C-HfB2 high-temperature eutectic in-situ composite ceramic
The invention discloses a preparation method for B4C-HfB2 high-temperature eutectic in-situ composite ceramic. According to the invention, the proportion of boron carbide and hafnium boride is changed so as to prepare a uniformly distributed eutectic structure, wherein the molar content of hafnium boride is 10% to 50%. The preparation method comprises the following concrete steps: uniformly mixing boron carbide powder and hafnium boride powder, then pressing the mixed powder into a flake with a diameter of 10 mm at room temperature via cold isostatic pressing and preparing a B4C-HfB2 eutectic composite material by using an arc melting method. Compared with a traditional solid phase sintering method, the preparation method provided by the invention has the following advantages: the method is simple, a preparation cycle is short, and the prepared B4C-HfB2 composite ceramic has high density and more excellent high temperature performance. In addition, the composite ceramic has performance advantages of both HfB2 and B4C and can be used as an ultra-high temperature ceramic material.
Preparation method for B4C-HfB2 high-temperature eutectic in-situ composite ceramic
The invention discloses a preparation method for B4C-HfB2 high-temperature eutectic in-situ composite ceramic. According to the invention, the proportion of boron carbide and hafnium boride is changed so as to prepare a uniformly distributed eutectic structure, wherein the molar content of hafnium boride is 10% to 50%. The preparation method comprises the following concrete steps: uniformly mixing boron carbide powder and hafnium boride powder, then pressing the mixed powder into a flake with a diameter of 10 mm at room temperature via cold isostatic pressing and preparing a B4C-HfB2 eutectic composite material by using an arc melting method. Compared with a traditional solid phase sintering method, the preparation method provided by the invention has the following advantages: the method is simple, a preparation cycle is short, and the prepared B4C-HfB2 composite ceramic has high density and more excellent high temperature performance. In addition, the composite ceramic has performance advantages of both HfB2 and B4C and can be used as an ultra-high temperature ceramic material.
Preparation method for B4C-HfB2 high-temperature eutectic in-situ composite ceramic
TU RONG (Autor:in) / LI NIAN (Autor:in) / LI QIZHONG (Autor:in) / ZHANG SONG (Autor:in) / ZHANG LIANMENG (Autor:in)
22.04.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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