Sintering and Mechanics Properties of C3N4 Based Ceramic Tool Materials

doi:10.3969/j.issn.1004-132X.2023.03.012

Abstract

Abstract: A new type of composite ceramic tool material was developed with C3N4 as matrix, Ti(C, N) as additive phase and Mo, Ni, Co as metal phase. By hot press sintering, C3N4 based ceramic tool materials were sintered. The fracture toughness, flexural strength and vickers hardness of the composites were measured and the microstructure was analyzed. The results show that the C3N4 based ceramic tool material containing 35% Ti(C, N) and 8% Ni-Co, which was sintered under the sintering temperature of 1600 ℃, duration time of 45 min and sintering pressure of 32 MPa, have the optimum mechanics properties. The appropriate content of Ti(C, N) may refine crystal grains of C3N4, increase sintering density, and improve mechanics properties. The microstructure may be fine and uniform with appropriate Ni-Co contents.

Key words: C3N4 based ceramic tool material, mechanics property, microstructure, component content, sintering process

摘要： 采用热压烧结工艺，以Ti(C, N)为添加相，以Mo、Ni和Co为金属相，成功制备了氮化碳(C3N4)基陶瓷刀具材料，测量了其断裂韧度、抗弯强度和维氏硬度，分析了其微观组织。结果表明，在烧结温度为1600 ℃、保温时间为45 min和烧结压力为32 MPa的工艺条件下，Ti(C, N)质量分数为35%、Ni-Co质量分数为8%的C3N4基陶瓷刀具材料力学性能最优。合适的Ti(C, N)含量能细化C3N4晶粒、提高烧结密度、改善力学性能，合适的Ni-Co含量能使微观组织细小均匀。

关键词: C3N4基陶瓷刀具材料, 力学性能, 微观组织, 组分含量, 烧结工艺

CLC Number:

TG711

ZHANG Yan, HUANG Chuanzhen, LIU Hanlian. Sintering and Mechanics Properties of C3N4 Based Ceramic Tool Materials[J]. China Mechanical Engineering, 2023, 34(03): 352-358，368.

张岩, 黄传真, 刘含莲. 氮化碳基陶瓷刀具材料的制备与力学性能研究[J]. 中国机械工程, 2023, 34(03): 352-358，368.

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