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Rapid preparation method of superhard light diamond-B4C-SiC ternary composite ceramic
The invention provides a rapid preparation method of superhard light diamond-B4C-SiC ternary composite ceramic. The rapid preparation method comprises the following steps: selecting raw material powder; preparing ternary mixed powder; carrying out in-situ reaction and rapid sintering on the powder; and carrying out subsequent processing treatment on the sample. The B4C-SiC ceramic phase accounts for 70-82% of the prepared superhard light diamond-B4C-SiC ternary composite ceramic, and the diamond phase accounts for 18-30% of the prepared superhard light diamond-B4C-SiC ternary composite ceramic. Diamond, boron powder and silicon powder are used as raw materials, and the prepared ternary mixed powder undergoes in-situ reaction rapid sintering under the conditions of a high heating rate and short heat preservation time, the sintering temperature of ceramic densification is reduced, and diamond graphitization is effectively inhibited; meanwhile, a liquid phase formed by silicon during sintering accelerates the reaction, so that the densification of the ternary composite ceramic is promoted; and the preparation cost is low, the production period is short, the diamond particles in the product are uniformly dispersed between B4C and SiC ceramic, no graphite residues exist, the structure is compact, and the characteristics of ultrahigh hardness, high strength, high toughness, light weight and the like are achieved.
本发明提供一种超硬轻质金刚石‑B4C‑SiC三元复合陶瓷的快速制备方法，包括以下步骤：原料粉体的选取；三元混合粉体的制备；粉体的原位反应快速烧结；样品的后续加工处理，制备的超硬轻质金刚石‑B4C‑SiC三元复合陶瓷中B4C‑SiC陶瓷相占比70‑82％，金刚石相占比18‑30％。本发明以金刚石、硼粉和硅粉为原料，配备的三元混合粉体，在高的升温速率和短的保温时间条件下进行原位反应快速烧结，降低了陶瓷致密化的烧结温度，有效抑制了金刚石石墨化；同时，硅在烧结时形成的液相加速了反应的进行，促进了三元复合陶瓷的致密化；本且制备成本低、生产周期短，产品中金刚石颗粒均匀分散于B4C与SiC陶瓷之间，无石墨残留且结构致密，具有超高硬度、高强度、高韧性以及轻质等特点。
Rapid preparation method of superhard light diamond-B4C-SiC ternary composite ceramic
The invention provides a rapid preparation method of superhard light diamond-B4C-SiC ternary composite ceramic. The rapid preparation method comprises the following steps: selecting raw material powder; preparing ternary mixed powder; carrying out in-situ reaction and rapid sintering on the powder; and carrying out subsequent processing treatment on the sample. The B4C-SiC ceramic phase accounts for 70-82% of the prepared superhard light diamond-B4C-SiC ternary composite ceramic, and the diamond phase accounts for 18-30% of the prepared superhard light diamond-B4C-SiC ternary composite ceramic. Diamond, boron powder and silicon powder are used as raw materials, and the prepared ternary mixed powder undergoes in-situ reaction rapid sintering under the conditions of a high heating rate and short heat preservation time, the sintering temperature of ceramic densification is reduced, and diamond graphitization is effectively inhibited; meanwhile, a liquid phase formed by silicon during sintering accelerates the reaction, so that the densification of the ternary composite ceramic is promoted; and the preparation cost is low, the production period is short, the diamond particles in the product are uniformly dispersed between B4C and SiC ceramic, no graphite residues exist, the structure is compact, and the characteristics of ultrahigh hardness, high strength, high toughness, light weight and the like are achieved.
本发明提供一种超硬轻质金刚石‑B4C‑SiC三元复合陶瓷的快速制备方法，包括以下步骤：原料粉体的选取；三元混合粉体的制备；粉体的原位反应快速烧结；样品的后续加工处理，制备的超硬轻质金刚石‑B4C‑SiC三元复合陶瓷中B4C‑SiC陶瓷相占比70‑82％，金刚石相占比18‑30％。本发明以金刚石、硼粉和硅粉为原料，配备的三元混合粉体，在高的升温速率和短的保温时间条件下进行原位反应快速烧结，降低了陶瓷致密化的烧结温度，有效抑制了金刚石石墨化；同时，硅在烧结时形成的液相加速了反应的进行，促进了三元复合陶瓷的致密化；本且制备成本低、生产周期短，产品中金刚石颗粒均匀分散于B4C与SiC陶瓷之间，无石墨残留且结构致密，具有超高硬度、高强度、高韧性以及轻质等特点。
Rapid preparation method of superhard light diamond-B4C-SiC ternary composite ceramic
一种超硬轻质金刚石-B4C-SiC三元复合陶瓷的快速制备方法
WANG WEIMIN (Autor:in) / AI RUOMENG (Autor:in) / HE QIANGLONG (Autor:in) / WANG AIYANG (Autor:in)
01.01.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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