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Silicon carbide ceramic sintering method used for whole bulletproof insertion plate
The invention relates to a silicon carbide ceramic sintering method used for a whole bulletproof insertion plate. The method is characterized by including the presintering step, the silicon plate manufacturing step, the furnace charging step and the high-temperature sintering step; in the presintering step, the temperature is raised for rubber removal, cooling is conducted, and blanks are taken out; in the silicon plate manufacturing step, silicon plates are manufactured by pressing fine silicon powder in a die for pressing the bulletproof insertion plate; in the furnace charging step, a graphite bottom plate is placed on a furnace plate, the blanks where rubber removal has been conducted are placed on the graphite bottom plate, the silicon plates are placed on the blanks, then, a blank and a silicon plate are alternately placed, a stack of six blanks and six silicon plates are placed in total, and the furnace is fully charged; in the high-temperature sintering step, the temperature is raised to a high temperature under vacuum and nitrogen protection and then temperature raising stops, vacuumizing continues to be conducted and then stops, nitrogen injection is conducted till the inner portion of a furnace body is in a slight negative pressure state, a furnace door is opened after cooling, and the finished product is obtained after being naturally cooled and taken out. The problems of deformation and cracks in the sintering process are reduced, and the furnace charging amount is large; the overall finished product rate of the bulletproof insertion plate is high, and the deformation degree of the bulletproof insertion plate is low; the finished product density is high; the bending strength is high; the breaking tenacity is high.
Silicon carbide ceramic sintering method used for whole bulletproof insertion plate
The invention relates to a silicon carbide ceramic sintering method used for a whole bulletproof insertion plate. The method is characterized by including the presintering step, the silicon plate manufacturing step, the furnace charging step and the high-temperature sintering step; in the presintering step, the temperature is raised for rubber removal, cooling is conducted, and blanks are taken out; in the silicon plate manufacturing step, silicon plates are manufactured by pressing fine silicon powder in a die for pressing the bulletproof insertion plate; in the furnace charging step, a graphite bottom plate is placed on a furnace plate, the blanks where rubber removal has been conducted are placed on the graphite bottom plate, the silicon plates are placed on the blanks, then, a blank and a silicon plate are alternately placed, a stack of six blanks and six silicon plates are placed in total, and the furnace is fully charged; in the high-temperature sintering step, the temperature is raised to a high temperature under vacuum and nitrogen protection and then temperature raising stops, vacuumizing continues to be conducted and then stops, nitrogen injection is conducted till the inner portion of a furnace body is in a slight negative pressure state, a furnace door is opened after cooling, and the finished product is obtained after being naturally cooled and taken out. The problems of deformation and cracks in the sintering process are reduced, and the furnace charging amount is large; the overall finished product rate of the bulletproof insertion plate is high, and the deformation degree of the bulletproof insertion plate is low; the finished product density is high; the bending strength is high; the breaking tenacity is high.
Silicon carbide ceramic sintering method used for whole bulletproof insertion plate
WANG RUJIANG (author) / ZHANG HUAISHUN (author) / YU HAIPEI (author)
2015-12-30
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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