【摘要】 针对Ti(C,N)基金属陶瓷性能与复杂形状难以协同的问题，以Ti(C,N)粉末为硬质相、CoCrCuFeNi高熵合金为黏结相，采用凝胶注模成型工艺制备Ti(C,N)基金属陶瓷，探究高熵合金含量对其成型特性、微观结构及力学性能的影响。结果表明：当高熵合金含量为20%时，浆料的沉降速率为0.004%/min，坯体致密度达59.32%且无明显缺陷，黏结相构成连续网状，包覆硬质相。随着高熵合金含量的升高，材料的力学性能呈现先升高后降低的趋势。在高熵合金含量为20%时，平均晶粒尺寸为2.37??m，硬度达到1 630HV30，抗弯强度为845.21 MPa，金属陶瓷的综合力学性能达到最优。高熵合金多组元协同效应可抑制晶粒异常长大、增强界面结合，该工艺为制备高性能、复杂形状Ti(C,N)基金属陶瓷提供了新思路。更多还原

【Abstract】 To address the challenge of synergising the properties of Ti(C,N)-based cermets with complex shapes, this study employed Ti(C,N) powder as the hard phase and a high-entropy alloy of CoCrCuFeNi as the binder phase. Ti(C,N)-based cermets were fabricated using a gel-casting process to investigate the effects of high-entropy alloy content on forming characteristics, microstructure, and mechanical properties. The results indicate that when the high-entropy alloy content is20%, the slurry settling rate is 0.004%/min; the green body density reaches 59.32% with no obvious defects, and the binder phase forms a continuous network enveloping the hard phase. As the high-entropy alloy content increases, the mechanical properties of the material first improve and then deteriorate. The cermets with a high-entropy alloy content of 20% exhibit excellent mechanical properties, with an average grain size of 2.37 ??m, a hardness of 1630 HV30, and a transverse rupture strength of 845.21 MPa. The synergistic effects of the multi-component high-entropy alloy suppress abnormal grain growth and enhance interfacial bonding. This study provides a new approach for the fabrication of high-performance and complexshaped Ti(C,N)-based cermets.更多还原