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ZrN-based composite ceramic and hot pressing reaction sintering preparation method thereof
The invention provides a hot-pressing reaction sintering preparation method of ZrN-based composite ceramic. The method comprises the following steps: a raw material pretreatment step: weighing alpha-Si3N4, ZrO2, La2O3 and Zr powder according to a molar ratio of (1-1.5): 3: (1.5-3.5): 1, adding a proper amount of an auxiliary agent, carrying out ball milling treatment, and then carrying out drying treatment and grinding treatment to obtain mixture powder; a forming treatment step: placing the mixture powder in a forming mold, and applying pressure for forming treatment to obtain a formed blank; and a hot-pressing reaction sintering treatment step: carrying out hot-pressing sintering treatment on the molded blank to obtain the ZrN-based composite ceramic. The ZrN-based composite ceramic has excellent comprehensive performance, the volume density of the ZrN-based composite ceramic reaches 94%-98%, the hardness of the ZrN-based composite ceramic can reach 10-11 GPa, the bending strength of the ZrN-based composite ceramic can reach 350-370 MPa, and the fracture toughness of the ZrN-based composite ceramic can reach 3.20-3.30 MPa.m < 1/2 >.
本申请提供一种ZrN基复相陶瓷的热压反应烧结制备方法，包括：原料预处理步骤：称取摩尔比为(1‑1.5):3:(1.5‑3.5):1的α‑Si3N4、ZrO2、La2O3、Zr粉，添加适量助剂后，进行球磨处理，然后经烘干处理、研磨处理，得到混合物粉末；成型处理步骤：将所述混合物粉末置于成型模具中，施加压力进行成型处理，得到成型坯；热压反应烧结处理步骤：将所述成型坯进行热压烧结处理，得到所述ZrN基复相陶瓷。上述ZrN基复相陶瓷，具有优异的综合性能，体积密度达94％‑98％，硬度可高达10‑11GPa，抗弯强度可高达350‑370MPa，断裂韧性可达3.20‑3.30MPa.m1/2。
ZrN-based composite ceramic and hot pressing reaction sintering preparation method thereof
The invention provides a hot-pressing reaction sintering preparation method of ZrN-based composite ceramic. The method comprises the following steps: a raw material pretreatment step: weighing alpha-Si3N4, ZrO2, La2O3 and Zr powder according to a molar ratio of (1-1.5): 3: (1.5-3.5): 1, adding a proper amount of an auxiliary agent, carrying out ball milling treatment, and then carrying out drying treatment and grinding treatment to obtain mixture powder; a forming treatment step: placing the mixture powder in a forming mold, and applying pressure for forming treatment to obtain a formed blank; and a hot-pressing reaction sintering treatment step: carrying out hot-pressing sintering treatment on the molded blank to obtain the ZrN-based composite ceramic. The ZrN-based composite ceramic has excellent comprehensive performance, the volume density of the ZrN-based composite ceramic reaches 94%-98%, the hardness of the ZrN-based composite ceramic can reach 10-11 GPa, the bending strength of the ZrN-based composite ceramic can reach 350-370 MPa, and the fracture toughness of the ZrN-based composite ceramic can reach 3.20-3.30 MPa.m < 1/2 >.
本申请提供一种ZrN基复相陶瓷的热压反应烧结制备方法，包括：原料预处理步骤：称取摩尔比为(1‑1.5):3:(1.5‑3.5):1的α‑Si3N4、ZrO2、La2O3、Zr粉，添加适量助剂后，进行球磨处理，然后经烘干处理、研磨处理，得到混合物粉末；成型处理步骤：将所述混合物粉末置于成型模具中，施加压力进行成型处理，得到成型坯；热压反应烧结处理步骤：将所述成型坯进行热压烧结处理，得到所述ZrN基复相陶瓷。上述ZrN基复相陶瓷，具有优异的综合性能，体积密度达94％‑98％，硬度可高达10‑11GPa，抗弯强度可高达350‑370MPa，断裂韧性可达3.20‑3.30MPa.m1/2。
ZrN-based composite ceramic and hot pressing reaction sintering preparation method thereof
一种ZrN基复相陶瓷及其热压反应烧结制备方法
04.06.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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