Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-density boron nitride ceramic material as well as preparation method and application thereof
The invention relates to a high-density boron nitride ceramic material as well as a preparation method and application thereof. The high-density boron nitride ceramic material comprises a main phase, a second phase and an additive, the main phase comprises h-BN, the second phase comprises Al2Y4O9, and the additive comprises chopped BN fibers. The strength of the BN composite ceramic material is enhanced by adding the chopped BN fibers into the high-density boron nitride ceramic material, meanwhile, the excellent wave-transparent performance of the BN ceramic is kept, meanwhile, the Al2Y4O9 can ensure that the boron nitride ceramic material with higher density is obtained through sintering under a relatively low-temperature condition, so that the energy consumption is reduced, the chopped BN fibers are combined with an h-BN main phase, and the energy consumption is reduced. Deformation of the h-BN main phase can be restrained, meanwhile, deformation of the h-BN main phase is restrained by the h-BN, and therefore the mutual enhancement effect is achieved; in addition, the mechanical property is further improved due to deflection of fibers or BN crystal grains when the fibers are broken and cracked, and the bending strength of the high-density boron nitride ceramic material is improved due to the comprehensive action.
本发明涉及一种高致密氮化硼陶瓷材料及其制备方法和应用，所述高致密氮化硼陶瓷材料包括主相、第二相和添加剂；所述主相包括h‑BN，所述第二相包括Al2Y4O9，所述添加剂包括短切BN纤维。本发明通过在高致密氮化硼陶瓷材料中添加短切BN纤维来增强BN复合陶瓷材料的强度，同时保持BN陶瓷优异的透波性能，同时Al2Y4O9能够保证在相对低温条件下烧结得到致密度更高的氮化硼陶瓷材料，从而降低能源消耗，短切BN纤维与h‑BN主相结合，能约束h‑BN主相的变形，同时其本身的变形又被h‑BN约束，从而达到相互增强的效果；另外，纤维拔断和裂纹遇纤维或BN晶粒发生偏转进一步提高力学性能，综合作用使得高致密氮化硼陶瓷材料的弯曲强度得到提高。
High-density boron nitride ceramic material as well as preparation method and application thereof
The invention relates to a high-density boron nitride ceramic material as well as a preparation method and application thereof. The high-density boron nitride ceramic material comprises a main phase, a second phase and an additive, the main phase comprises h-BN, the second phase comprises Al2Y4O9, and the additive comprises chopped BN fibers. The strength of the BN composite ceramic material is enhanced by adding the chopped BN fibers into the high-density boron nitride ceramic material, meanwhile, the excellent wave-transparent performance of the BN ceramic is kept, meanwhile, the Al2Y4O9 can ensure that the boron nitride ceramic material with higher density is obtained through sintering under a relatively low-temperature condition, so that the energy consumption is reduced, the chopped BN fibers are combined with an h-BN main phase, and the energy consumption is reduced. Deformation of the h-BN main phase can be restrained, meanwhile, deformation of the h-BN main phase is restrained by the h-BN, and therefore the mutual enhancement effect is achieved; in addition, the mechanical property is further improved due to deflection of fibers or BN crystal grains when the fibers are broken and cracked, and the bending strength of the high-density boron nitride ceramic material is improved due to the comprehensive action.
本发明涉及一种高致密氮化硼陶瓷材料及其制备方法和应用，所述高致密氮化硼陶瓷材料包括主相、第二相和添加剂；所述主相包括h‑BN，所述第二相包括Al2Y4O9，所述添加剂包括短切BN纤维。本发明通过在高致密氮化硼陶瓷材料中添加短切BN纤维来增强BN复合陶瓷材料的强度，同时保持BN陶瓷优异的透波性能，同时Al2Y4O9能够保证在相对低温条件下烧结得到致密度更高的氮化硼陶瓷材料，从而降低能源消耗，短切BN纤维与h‑BN主相结合，能约束h‑BN主相的变形，同时其本身的变形又被h‑BN约束，从而达到相互增强的效果；另外，纤维拔断和裂纹遇纤维或BN晶粒发生偏转进一步提高力学性能，综合作用使得高致密氮化硼陶瓷材料的弯曲强度得到提高。
High-density boron nitride ceramic material as well as preparation method and application thereof
一种高致密氮化硼陶瓷材料及其制备方法和应用
ZHANG WEIGANG (Autor:in) / YANG HAIJUN (Autor:in) / SUN XIAOMING (Autor:in) / GE MIN (Autor:in) / XIAO WEN (Autor:in) / ZHAO HUIHUI (Autor:in)
10.12.2024
Patent
Elektronische Ressource
Chinesisch
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