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A platform for research: civil engineering, architecture and urbanism
Graphene toughened high-entropy silicide ceramic as well as preparation method and application thereof
The invention belongs to the field of high-entropy ceramic materials, and discloses graphene toughened high-entropy silicide ceramic as well as a preparation method and application thereof. The high-entropy silicide ceramic is prepared by the following steps: mixing any five metals of Ti, Zr, Nb, Mo, W and Ta with Si powder, adding graphene nanosheets, carrying out ball milling to obtain mixed powder, applying pressure of 10-30 MPa in a protective atmosphere, carrying out SPS sintering at 900-1300 DEG C, and naturally cooling, wherein the molar ratio of the total mole of any five metals to Siis 1: 2, and any five metals have the same mole. A small amount of graphene nanoplates are added to toughen the high-entropy silicide ceramic and improve the fracture toughness and bending resistanceof the high-entropy silicide ceramic, and oxygen elements introduced in the raw materials or the preparation process are consumed to improve the sintering density of the material. The prepared ceramiccan be widely applied to heat insulation parts, protective shells or structural parts with complex structures in various high-temperature occasions.
本发明属于高熵陶瓷材料领域，公开了一种石墨烯增韧的高熵硅化物陶瓷及其制备方法和应用。该高熵硅化物陶瓷是将Ti、Zr、Nb、Mo、W、Ta中的任意五种金属与Si粉体混合，加入石墨烯纳米片，经球磨得到混合粉体，在保护气氛下，施加压力10～30MPa，在900～1300℃进行SPS烧结，自然冷却制得；其中，所述任意五种金属的总摩尔与Si的摩尔比为1：2；所述任意五种金属为相同摩尔。本发明通过加入少量石墨烯纳米板实现对高熵硅化物陶瓷的增韧，提高其断裂韧性与抗弯性能，并消耗原料或制备过程中引入的氧元素，提高材料的烧结致密度。制得的陶瓷可广泛应用于各种高温场合下的隔热零件、保护外壳或结构复杂的结构件。
Graphene toughened high-entropy silicide ceramic as well as preparation method and application thereof
The invention belongs to the field of high-entropy ceramic materials, and discloses graphene toughened high-entropy silicide ceramic as well as a preparation method and application thereof. The high-entropy silicide ceramic is prepared by the following steps: mixing any five metals of Ti, Zr, Nb, Mo, W and Ta with Si powder, adding graphene nanosheets, carrying out ball milling to obtain mixed powder, applying pressure of 10-30 MPa in a protective atmosphere, carrying out SPS sintering at 900-1300 DEG C, and naturally cooling, wherein the molar ratio of the total mole of any five metals to Siis 1: 2, and any five metals have the same mole. A small amount of graphene nanoplates are added to toughen the high-entropy silicide ceramic and improve the fracture toughness and bending resistanceof the high-entropy silicide ceramic, and oxygen elements introduced in the raw materials or the preparation process are consumed to improve the sintering density of the material. The prepared ceramiccan be widely applied to heat insulation parts, protective shells or structural parts with complex structures in various high-temperature occasions.
本发明属于高熵陶瓷材料领域，公开了一种石墨烯增韧的高熵硅化物陶瓷及其制备方法和应用。该高熵硅化物陶瓷是将Ti、Zr、Nb、Mo、W、Ta中的任意五种金属与Si粉体混合，加入石墨烯纳米片，经球磨得到混合粉体，在保护气氛下，施加压力10～30MPa，在900～1300℃进行SPS烧结，自然冷却制得；其中，所述任意五种金属的总摩尔与Si的摩尔比为1：2；所述任意五种金属为相同摩尔。本发明通过加入少量石墨烯纳米板实现对高熵硅化物陶瓷的增韧，提高其断裂韧性与抗弯性能，并消耗原料或制备过程中引入的氧元素，提高材料的烧结致密度。制得的陶瓷可广泛应用于各种高温场合下的隔热零件、保护外壳或结构复杂的结构件。
Graphene toughened high-entropy silicide ceramic as well as preparation method and application thereof
一种石墨烯增韧的高熵硅化物陶瓷及其制备方法和应用
ZHOU YUZHANG (author) / TAN DAWANG (author) / GUO WEIMING (author) / LIN HUATAI (author)
2020-12-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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