Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of high-strength composite foamed ceramic
The invention relates to a preparation method of high-strength composite foamed ceramic, and belongs to the technical field of ceramic materials. Silicon nitride and zirconium oxide whiskers are usedas raw materials to prepare the high-strength composite foamed ceramic, zirconium oxide is a high-hardness compound and can play a role in dispersion enhancement in the foamed ceramic, zirconium oxideis in a pressed state in a matrix due to thermal mismatch of the zirconium oxide whiskers and silicon nitride. A semi-coherent structure and a co-permeation structure are not easy to form at the grain boundary, so that the semi-coherent structure and the co-permeation structure can be well connected; the material keeps very high mechanical strength, and the addition of the zirconium oxide whiskers increases the constraint on a matrix, so that the phase-change capability is reduced, the aging phenomenon of the zirconium oxide whiskers can be inhibited, and the oxidation resistance of the foamed ceramic is improved; the zirconium oxide whiskers can also form a layer of compact zirconium oxide film on the surface of the composite foamed ceramic, and oxygen can be effectively prevented from entering, so that the oxidation resistance and the mechanical property of the composite foamed ceramic are improved.
本发明涉及一种高强度复合泡沫陶瓷的制备方法，属于陶瓷材料技术领域。本发明以氮化硅和氧化锆晶须为原料，制备一种高强度复合泡沫陶瓷，氧化锆是一种高硬度的化合物，在泡沫陶瓷中可以起到弥散增强作用，氧化锆晶须和氮化硅的热失配使氧化锆在基体中处于受压状态，晶界处不易形成半共格和共渗结构，使两者可以很好的连接，材料保持了很高的力学强度，且氧化锆晶须的加入增加了对基体的约束，从而降低了可相变能力，可以抑制氧化锆晶须老化现象的发生，从而提高泡沫陶瓷的抗氧化性能，氧化锆晶须还能在复合泡沫陶瓷的表面形成一层致密的氧化锆薄膜，能有效阻隔氧气的进入，从而提高复合泡沫陶瓷的抗氧化性和力学性能。
Preparation method of high-strength composite foamed ceramic
The invention relates to a preparation method of high-strength composite foamed ceramic, and belongs to the technical field of ceramic materials. Silicon nitride and zirconium oxide whiskers are usedas raw materials to prepare the high-strength composite foamed ceramic, zirconium oxide is a high-hardness compound and can play a role in dispersion enhancement in the foamed ceramic, zirconium oxideis in a pressed state in a matrix due to thermal mismatch of the zirconium oxide whiskers and silicon nitride. A semi-coherent structure and a co-permeation structure are not easy to form at the grain boundary, so that the semi-coherent structure and the co-permeation structure can be well connected; the material keeps very high mechanical strength, and the addition of the zirconium oxide whiskers increases the constraint on a matrix, so that the phase-change capability is reduced, the aging phenomenon of the zirconium oxide whiskers can be inhibited, and the oxidation resistance of the foamed ceramic is improved; the zirconium oxide whiskers can also form a layer of compact zirconium oxide film on the surface of the composite foamed ceramic, and oxygen can be effectively prevented from entering, so that the oxidation resistance and the mechanical property of the composite foamed ceramic are improved.
本发明涉及一种高强度复合泡沫陶瓷的制备方法，属于陶瓷材料技术领域。本发明以氮化硅和氧化锆晶须为原料，制备一种高强度复合泡沫陶瓷，氧化锆是一种高硬度的化合物，在泡沫陶瓷中可以起到弥散增强作用，氧化锆晶须和氮化硅的热失配使氧化锆在基体中处于受压状态，晶界处不易形成半共格和共渗结构，使两者可以很好的连接，材料保持了很高的力学强度，且氧化锆晶须的加入增加了对基体的约束，从而降低了可相变能力，可以抑制氧化锆晶须老化现象的发生，从而提高泡沫陶瓷的抗氧化性能，氧化锆晶须还能在复合泡沫陶瓷的表面形成一层致密的氧化锆薄膜，能有效阻隔氧气的进入，从而提高复合泡沫陶瓷的抗氧化性和力学性能。
Preparation method of high-strength composite foamed ceramic
一种高强度复合泡沫陶瓷的制备方法
WANG GUIHUA (Autor:in)
01.01.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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