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Layered boron nitride grain boundary phase toughened sphalerite boron nitride ceramic and preparation method thereof
The invention discloses a layered boron nitride grain boundary phase toughened sphalerite boron nitride ceramic and a preparation method thereof. The ceramic body comprises two typical organizational structures: one of the two typical organizational structures is that when a layered BN grain boundary phase is distributed around sphalerite boron nitride grains, the hardness of the material reaches 20-40 GPa, and the fracture toughness reaches 6-9 MPa.m < 1/2 >; and the other one is that when the layered BN grain boundary phase only exists at the sphalerite boron nitride grain boundary intersection (triangular region), the hardness of the material is greater than 40 GPa, and the fracture toughness is greater than 9 MPa.m < 1/2 >. The invention also discloses a process for preparing the layered boron nitride (BN) grain boundary phase toughened sphalerite boron nitride ceramic body. The process comprises the following steps: sintering a BN powder raw material with one or more phase structures in a non-pressure or high-temperature and high-pressure manner, and forming a ceramic body which takes sphalerite boron nitride as a main phase and takes layered BN as a grain boundary phase in situ.
本发明公开了一种层状氮化硼晶界相增韧的闪锌矿氮化硼陶瓷及其制备方法。该陶瓷体包括两种典型组织结构：一种是当层状BN晶界相分布于闪锌矿氮化硼晶粒周围时，材料的硬度达到20～40GPa，断裂韧性达到6～9MPa·m1/2；另一种是当层状BN晶界相只存在于闪锌矿氮化硼晶界交汇处(三角区)时，材料的硬度达大于40GPa，断裂韧性大于9MPa·m1/2。本发明还公开一种制备上述层状氮化硼(BN)晶界相增韧的闪锌矿氮化硼陶瓷体的工艺。该工艺包括无压或高温高压烧结一种或多种相结构的BN粉体原料，原位形成了以闪锌矿氮化硼为主相，层状BN为晶界相的陶瓷体。
Layered boron nitride grain boundary phase toughened sphalerite boron nitride ceramic and preparation method thereof
The invention discloses a layered boron nitride grain boundary phase toughened sphalerite boron nitride ceramic and a preparation method thereof. The ceramic body comprises two typical organizational structures: one of the two typical organizational structures is that when a layered BN grain boundary phase is distributed around sphalerite boron nitride grains, the hardness of the material reaches 20-40 GPa, and the fracture toughness reaches 6-9 MPa.m < 1/2 >; and the other one is that when the layered BN grain boundary phase only exists at the sphalerite boron nitride grain boundary intersection (triangular region), the hardness of the material is greater than 40 GPa, and the fracture toughness is greater than 9 MPa.m < 1/2 >. The invention also discloses a process for preparing the layered boron nitride (BN) grain boundary phase toughened sphalerite boron nitride ceramic body. The process comprises the following steps: sintering a BN powder raw material with one or more phase structures in a non-pressure or high-temperature and high-pressure manner, and forming a ceramic body which takes sphalerite boron nitride as a main phase and takes layered BN as a grain boundary phase in situ.
本发明公开了一种层状氮化硼晶界相增韧的闪锌矿氮化硼陶瓷及其制备方法。该陶瓷体包括两种典型组织结构：一种是当层状BN晶界相分布于闪锌矿氮化硼晶粒周围时，材料的硬度达到20～40GPa，断裂韧性达到6～9MPa·m1/2；另一种是当层状BN晶界相只存在于闪锌矿氮化硼晶界交汇处(三角区)时，材料的硬度达大于40GPa，断裂韧性大于9MPa·m1/2。本发明还公开一种制备上述层状氮化硼(BN)晶界相增韧的闪锌矿氮化硼陶瓷体的工艺。该工艺包括无压或高温高压烧结一种或多种相结构的BN粉体原料，原位形成了以闪锌矿氮化硼为主相，层状BN为晶界相的陶瓷体。
Layered boron nitride grain boundary phase toughened sphalerite boron nitride ceramic and preparation method thereof
层状氮化硼晶界相增韧的闪锌矿氮化硼陶瓷及其制备方法
ZHAO ZHISHENG (Autor:in) / SUN LEI (Autor:in) / LUO KUN (Autor:in) / CHEN JUNYUN (Autor:in) / LIU BING (Autor:in) / HE JULONG (Autor:in) / YU DONGLI (Autor:in) / LIU ZHONGYUAN (Autor:in) / HU WENTAO (Autor:in) / XU BO (Autor:in)
19.07.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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