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Preparation method of high-hardness aluminum oxide composite ceramic
The invention provides a preparation method of high-hardness aluminum oxide composite ceramic, which comprises the following steps: step 1, treating well mixed Al2O3 and cBN mixed powder at 500-1600 DEG C for 0.1-10 hours; 2, the mixed powder obtained after heat treatment is subjected to pre-pressing forming, a biscuit is obtained, and the compactness of the biscuit formed through pre-pressing is larger than 30%; and 3, heating the biscuit under a high-pressure condition at 800-1600 DEG C, carrying out heat preservation for 1-30 min, and cooling to obtain the aluminum oxide ceramic superhard composite material. According to the preparation method, Al2O3 and cBN powder with specific sizes are taken as raw materials, Al2O3 is taken as a matrix, cBN is taken as a reinforcing phase, the Al2O3 and cBN powder are mixed according to a specific volume ratio, mixed powder composed of the Al2O3 and cBN powder is subjected to pre-pressing forming and then is sintered at proper high temperature and high pressure, a jujube cake model structure with Al2O3 wrapping cBN particles is formed, and the hardness of the alumina ceramic can be effectively improved.
本发明提供了一种高硬度氧化铝复合陶瓷制备方法，包括：步骤1：取混合好的Al2O3和cBN混合粉料在500‑1600℃条件下，处理0.1‑10h；步骤2：对热处理后的混合粉料进行预压成型，获得素坯，且预压所形成素坯的密实度大于30％；步骤3：对素坯在高压条件下，控制温度在800‑1600℃加热，保温时间为1min‑30min，并降温获得氧化铝陶瓷超硬复合材料。本发明以特定尺寸的Al2O3和cBN粉末为原料，Al2O3为基体，cBN作为增强相，并将Al2O3和cBN粉体按特定的体积比配料，再将Al2O3和cBN粉体组成的混合粉料预压成型后在适宜的高温高压烧结，形成Al2O3包裹cBN颗粒的“枣糕模型”结构，可有效提高氧化铝陶瓷硬度。
Preparation method of high-hardness aluminum oxide composite ceramic
The invention provides a preparation method of high-hardness aluminum oxide composite ceramic, which comprises the following steps: step 1, treating well mixed Al2O3 and cBN mixed powder at 500-1600 DEG C for 0.1-10 hours; 2, the mixed powder obtained after heat treatment is subjected to pre-pressing forming, a biscuit is obtained, and the compactness of the biscuit formed through pre-pressing is larger than 30%; and 3, heating the biscuit under a high-pressure condition at 800-1600 DEG C, carrying out heat preservation for 1-30 min, and cooling to obtain the aluminum oxide ceramic superhard composite material. According to the preparation method, Al2O3 and cBN powder with specific sizes are taken as raw materials, Al2O3 is taken as a matrix, cBN is taken as a reinforcing phase, the Al2O3 and cBN powder are mixed according to a specific volume ratio, mixed powder composed of the Al2O3 and cBN powder is subjected to pre-pressing forming and then is sintered at proper high temperature and high pressure, a jujube cake model structure with Al2O3 wrapping cBN particles is formed, and the hardness of the alumina ceramic can be effectively improved.
本发明提供了一种高硬度氧化铝复合陶瓷制备方法，包括：步骤1：取混合好的Al2O3和cBN混合粉料在500‑1600℃条件下，处理0.1‑10h；步骤2：对热处理后的混合粉料进行预压成型，获得素坯，且预压所形成素坯的密实度大于30％；步骤3：对素坯在高压条件下，控制温度在800‑1600℃加热，保温时间为1min‑30min，并降温获得氧化铝陶瓷超硬复合材料。本发明以特定尺寸的Al2O3和cBN粉末为原料，Al2O3为基体，cBN作为增强相，并将Al2O3和cBN粉体按特定的体积比配料，再将Al2O3和cBN粉体组成的混合粉料预压成型后在适宜的高温高压烧结，形成Al2O3包裹cBN颗粒的“枣糕模型”结构，可有效提高氧化铝陶瓷硬度。
Preparation method of high-hardness aluminum oxide composite ceramic
一种高硬度氧化铝复合陶瓷制备方法
REN XIANGTING (Autor:in) / YAN XIAOZHI (Autor:in)
08.03.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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