Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-hardness nano aluminum nitride ceramic and preparation method thereof
The invention belongs to the technical field of nano ceramics, and particularly relates to a high-hardness nano aluminum nitride ceramic and a preparation method thereof.The method comprises the step that nano aluminum nitride powder serves as a raw material, and Joule heat or discharge plasma sintering is adopted to prepare the high-hardness nano aluminum nitride ceramic. When Joule hot sintering is adopted, pouring the nano aluminum nitride powder into a mold for dry pressing molding, or adding a sintering aid, performing wet grinding, drying, performing dry pressing molding, and performing cold isostatic pressing treatment to obtain a ceramic wafer green body; and performing Joule thermal sintering on the ceramic chip green body at the sintering temperature of 1700-1900 DEG C for 0-60 seconds to obtain the high-hardness nano aluminum nitride ceramic. According to the method, grain growth in the ceramic sintering process is effectively slowed down through short-time ceramic sintering, high temperature rising and falling speed and the pressurization effect of discharge plasma sintering, and the obtained ceramic has the performance characteristics of nanoscale grain size and high hardness of the nano ceramic.
本发明属于纳米陶瓷技术领域，尤其涉及一种高硬度纳米氮化铝陶瓷及其制备方法，所述方法包括：以纳米氮化铝粉末为原料，采用焦耳热或放电等离子体烧结制备得到高硬度纳米氮化铝陶瓷。采用焦耳热烧结时，将所述纳米氮化铝粉末倒入模具中干压成型，或加烧结助剂后湿磨干燥后干压成型，再通过冷等静压处理，得到陶瓷片生坯；对所述陶瓷片生坯进行焦耳热烧结，烧结温度为1700‑1900℃，烧结时间为0‑60s，得到所述高硬度纳米氮化铝陶瓷。本发明中，短时间的陶瓷烧结和较快的升降温速率，以及放电等离子体烧结的加压作用，有效减缓了陶瓷烧结过程中的晶粒生长，使所得陶瓷具有纳米尺度的晶粒大小和纳米陶瓷高硬度的性能特点。
High-hardness nano aluminum nitride ceramic and preparation method thereof
The invention belongs to the technical field of nano ceramics, and particularly relates to a high-hardness nano aluminum nitride ceramic and a preparation method thereof.The method comprises the step that nano aluminum nitride powder serves as a raw material, and Joule heat or discharge plasma sintering is adopted to prepare the high-hardness nano aluminum nitride ceramic. When Joule hot sintering is adopted, pouring the nano aluminum nitride powder into a mold for dry pressing molding, or adding a sintering aid, performing wet grinding, drying, performing dry pressing molding, and performing cold isostatic pressing treatment to obtain a ceramic wafer green body; and performing Joule thermal sintering on the ceramic chip green body at the sintering temperature of 1700-1900 DEG C for 0-60 seconds to obtain the high-hardness nano aluminum nitride ceramic. According to the method, grain growth in the ceramic sintering process is effectively slowed down through short-time ceramic sintering, high temperature rising and falling speed and the pressurization effect of discharge plasma sintering, and the obtained ceramic has the performance characteristics of nanoscale grain size and high hardness of the nano ceramic.
本发明属于纳米陶瓷技术领域，尤其涉及一种高硬度纳米氮化铝陶瓷及其制备方法，所述方法包括：以纳米氮化铝粉末为原料，采用焦耳热或放电等离子体烧结制备得到高硬度纳米氮化铝陶瓷。采用焦耳热烧结时，将所述纳米氮化铝粉末倒入模具中干压成型，或加烧结助剂后湿磨干燥后干压成型，再通过冷等静压处理，得到陶瓷片生坯；对所述陶瓷片生坯进行焦耳热烧结，烧结温度为1700‑1900℃，烧结时间为0‑60s，得到所述高硬度纳米氮化铝陶瓷。本发明中，短时间的陶瓷烧结和较快的升降温速率，以及放电等离子体烧结的加压作用，有效减缓了陶瓷烧结过程中的晶粒生长，使所得陶瓷具有纳米尺度的晶粒大小和纳米陶瓷高硬度的性能特点。
High-hardness nano aluminum nitride ceramic and preparation method thereof
一种高硬度纳米氮化铝陶瓷及其制备方法
LI SHUXING (Autor:in) / XIE RONGJUN (Autor:in) / XIE AN (Autor:in) / ZHANG MINSHU (Autor:in) / ZHONG XUHANG (Autor:in)
17.10.2023
Patent
Elektronische Ressource
Chinesisch
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