Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Method for preparing high-hardness and high-toughness silicon nitride ceramic through spark plasma sintering
The invention relates to the technical field of ceramic materials, in particular to a method for preparing high-hardness and high-toughness silicon nitride ceramic through spark plasma sintering, CaF2, LaF3, Al2O3 and MgSiN2 are used as sintering aids, micron-sized TiN is used as a reinforcing phase, alpha-Si3N4 is selected as matrix powder, Si3N4 ceramic is prepared through spark plasma sintering, and the silicon nitride ceramic with excellent performance can be prepared; according to the present invention, the fluoride is adopted to replace the commonly used more oxides such as Y2O3, MgO and the like, such that the existence of the lattice oxygen during the sintering process can be reduced so as to improve the thermal conductivity of the ceramic, the addition of the reinforcing phase can further improve the mechanical property of the ceramic, and the addition amount of the two sintering aids is controlled to 10-13 wt.% so as to improve the mechanical property of the silicon nitride ceramic; the silicon nitride ceramic with excellent performance can be rapidly prepared by adopting spark plasma sintering, the cost is reduced, the efficiency of preparing the silicon nitride ceramic is improved, and the ceramic can be produced on a large scale.
本发明涉及陶瓷材料技术领域，尤其为一种放电等离子烧结制备高硬度高韧性氮化硅陶瓷的方法，通过使用CaF2、LaF3、Al2O3、MgSiN2作为烧结助剂，微米级TiN作为增强相，选择α‑Si3N4作为基体粉末，通过放电等离子烧结制备Si3N4陶瓷，能够制备出优异性能的氮化硅陶瓷；使用氟化物替代通常使用较多的Y2O3、MgO等氧化物，可以减少烧结过程中晶格氧的存在，从而提升陶瓷的热导率，增强相的加入可以进一步提升陶瓷的力学性能，将两种烧结助剂的添加量控制在10‑13wt.％，能够提高氮化硅陶瓷的力学性能；采用放电等离子烧结就可以快速制备出优异性能的氮化硅陶瓷，降低了成本，提高制备氮化硅陶瓷的效率，使得陶瓷可以大规模生产。
Method for preparing high-hardness and high-toughness silicon nitride ceramic through spark plasma sintering
The invention relates to the technical field of ceramic materials, in particular to a method for preparing high-hardness and high-toughness silicon nitride ceramic through spark plasma sintering, CaF2, LaF3, Al2O3 and MgSiN2 are used as sintering aids, micron-sized TiN is used as a reinforcing phase, alpha-Si3N4 is selected as matrix powder, Si3N4 ceramic is prepared through spark plasma sintering, and the silicon nitride ceramic with excellent performance can be prepared; according to the present invention, the fluoride is adopted to replace the commonly used more oxides such as Y2O3, MgO and the like, such that the existence of the lattice oxygen during the sintering process can be reduced so as to improve the thermal conductivity of the ceramic, the addition of the reinforcing phase can further improve the mechanical property of the ceramic, and the addition amount of the two sintering aids is controlled to 10-13 wt.% so as to improve the mechanical property of the silicon nitride ceramic; the silicon nitride ceramic with excellent performance can be rapidly prepared by adopting spark plasma sintering, the cost is reduced, the efficiency of preparing the silicon nitride ceramic is improved, and the ceramic can be produced on a large scale.
本发明涉及陶瓷材料技术领域，尤其为一种放电等离子烧结制备高硬度高韧性氮化硅陶瓷的方法，通过使用CaF2、LaF3、Al2O3、MgSiN2作为烧结助剂，微米级TiN作为增强相，选择α‑Si3N4作为基体粉末，通过放电等离子烧结制备Si3N4陶瓷，能够制备出优异性能的氮化硅陶瓷；使用氟化物替代通常使用较多的Y2O3、MgO等氧化物，可以减少烧结过程中晶格氧的存在，从而提升陶瓷的热导率，增强相的加入可以进一步提升陶瓷的力学性能，将两种烧结助剂的添加量控制在10‑13wt.％，能够提高氮化硅陶瓷的力学性能；采用放电等离子烧结就可以快速制备出优异性能的氮化硅陶瓷，降低了成本，提高制备氮化硅陶瓷的效率，使得陶瓷可以大规模生产。
Method for preparing high-hardness and high-toughness silicon nitride ceramic through spark plasma sintering
一种放电等离子烧结制备高硬度高韧性氮化硅陶瓷的方法
TIAN JUN (Autor:in) / FU GUOFENG (Autor:in) / ZHOU JUAN (Autor:in) / LIN ZHIJIE (Autor:in) / DAI PINQIANG (Autor:in) / CHANG FA (Autor:in) / HONG CHUNFU (Autor:in)
29.03.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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