Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method for improving toughness of silicon nitride
The invention discloses a preparation method for improving the toughness of silicon nitride, relates to a preparation method of silicon nitride, and aims to solve the problem that the brittleness of silicon nitride is always the biggest problem limiting the application of silicon nitride ceramics, so that the application comprises the following steps: S1, preparing raw materials: adding SiC whiskers and Si3N4 short fibers into alpha-Si3N4 and beta-Si3N4; s2, the raw materials are poured into a closed stirrer to be stirred, SiC whiskers, Si3N4 short fibers and PVA are added into the stirrer, the closed stirrer is heated and subjected to heat preservation till the temperature in the closed stirrer is kept at 80-100 DEG C, and the closed stirrer is ventilated for 1-2 h; s3, adjusting the dosage components of the sintering aid; s4, granulating a finished product obtained in the step S2; and S5, carrying out high-temperature sintering on the particle finished product in S4, and adding the sintering aid prepared in S3. According to the preparation method disclosed by the invention, by improving a silicon nitride preparation mode, the fracture toughness of a prepared sample can be improved to 7.82 MPa.m < 1/2 > from the fracture toughness 5.2 MPa.m < 1/2 > of common silicon nitride ceramic, so that the toughness of silicon nitride is effectively improved.
本发明公开了一种增加氮化硅韧性的制备方法，涉及一种氮化硅制备方法，由于氮化硅脆性一直是限制氮化硅陶瓷应用的最大问题，所以本申请包括以下步骤：S1、制备原材料，在α‑Si3N4和β‑Si3N4中添加SiC晶须和Si3N4短纤维；S2、原材料倒入密闭搅拌器内搅拌，在搅拌器中加入SiC晶须、Si3N4短纤维和PVA，对所述密闭搅拌器加热保温直至密闭搅拌器内的温度维持80‑100℃，对所述密闭搅拌器通气1‑2h；S3、调节助烧剂用量成分；S4、对步骤S2中所得成品造粒；S5、对S4中的颗粒成品高温烧结，加入步骤S3中调制的助烧剂，本申请通过对氮化硅制作方式的改进，能够使得制备的样品由普通氮化硅陶瓷断裂韧性5.2MPa·m1/2，提高至断裂韧性为7.82MPa·m1/2，从而有效地提高氮化硅的韧性。
Preparation method for improving toughness of silicon nitride
The invention discloses a preparation method for improving the toughness of silicon nitride, relates to a preparation method of silicon nitride, and aims to solve the problem that the brittleness of silicon nitride is always the biggest problem limiting the application of silicon nitride ceramics, so that the application comprises the following steps: S1, preparing raw materials: adding SiC whiskers and Si3N4 short fibers into alpha-Si3N4 and beta-Si3N4; s2, the raw materials are poured into a closed stirrer to be stirred, SiC whiskers, Si3N4 short fibers and PVA are added into the stirrer, the closed stirrer is heated and subjected to heat preservation till the temperature in the closed stirrer is kept at 80-100 DEG C, and the closed stirrer is ventilated for 1-2 h; s3, adjusting the dosage components of the sintering aid; s4, granulating a finished product obtained in the step S2; and S5, carrying out high-temperature sintering on the particle finished product in S4, and adding the sintering aid prepared in S3. According to the preparation method disclosed by the invention, by improving a silicon nitride preparation mode, the fracture toughness of a prepared sample can be improved to 7.82 MPa.m < 1/2 > from the fracture toughness 5.2 MPa.m < 1/2 > of common silicon nitride ceramic, so that the toughness of silicon nitride is effectively improved.
本发明公开了一种增加氮化硅韧性的制备方法，涉及一种氮化硅制备方法，由于氮化硅脆性一直是限制氮化硅陶瓷应用的最大问题，所以本申请包括以下步骤：S1、制备原材料，在α‑Si3N4和β‑Si3N4中添加SiC晶须和Si3N4短纤维；S2、原材料倒入密闭搅拌器内搅拌，在搅拌器中加入SiC晶须、Si3N4短纤维和PVA，对所述密闭搅拌器加热保温直至密闭搅拌器内的温度维持80‑100℃，对所述密闭搅拌器通气1‑2h；S3、调节助烧剂用量成分；S4、对步骤S2中所得成品造粒；S5、对S4中的颗粒成品高温烧结，加入步骤S3中调制的助烧剂，本申请通过对氮化硅制作方式的改进，能够使得制备的样品由普通氮化硅陶瓷断裂韧性5.2MPa·m1/2，提高至断裂韧性为7.82MPa·m1/2，从而有效地提高氮化硅的韧性。
Preparation method for improving toughness of silicon nitride
一种增加氮化硅韧性的制备方法
TIAN XIN (Autor:in) / XU TAO (Autor:in) / YI HENGBIN (Autor:in) / ZHANG YING (Autor:in) / WANG TINGTING (Autor:in) / CHANG YANJIE (Autor:in)
06.05.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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