中国机械工程 ›› 2026, Vol. 37 ›› Issue (9): 2290-2297.DOI: 10.3969/j.issn.1004-132X.2026.09.021

• 先进材料加工工程 • 上一篇    

SPS烧结添加导电增强相的Si3N4基复合陶瓷刀具材料的电热行为仿真与试验研究

尹明越1,2,3(), 刘含莲1,2,3(), 黄传真4, 王冠群1,2,3, 刘盾1,2,3, 裘英华1,2,3, 徐龙华4   

  1. 1.山东大学机械工程学院, 济南, 250061
    2.山东大学高效洁净机械制造教育部重点实验室, 济南, 250061
    3.山东大学先进射流技术研究中心, 济南, 250061
    4.燕山大学机械工程学院, 秦皇岛, 066004
  • 收稿日期:2025-08-29 出版日期:2026-09-25 发布日期:2026-10-21
  • 通讯作者: 刘含莲
  • 作者简介:尹明越,男,2001年生,硕士研究生。研究方向为高性能氮化硅基陶瓷刀具材料设计。E-mail:17854798184@163.com
    刘含莲*(通信作者),女,1970年生,教授、博士研究生导师。研究方向为高效加工及刀具技术。E-mail:lhl70@sdu.edu.cn。
  • 基金资助:
    国家自然科学基金(52475472);国家自然科学基金(52275464)

Simulation and Experimental Study on Electrothermal Behavior of SPS-sintered Si3N4-based Composite Ceramic Tool Materials with Conductive Reinforcing Phase

YIN Mingyue1,2,3(), LIU Hanlian1,2,3(), HUANG Chuanzhen4, WANG Guanqun1,2,3, LIU Dun1,2,3, QIU Yinghua1,2,3, XU Longhua4   

  1. 1.School of Mechanical Engineering,Shandong University,Jinan,250061
    2.Key Laboratory of High-efficiency and Clean Mechanical Manufacture,Ministry of Education,Shandong University,Jinan,250061
    3.Center for Advanced Jet Engineering Technologies(CaJET),Shandong University,Jinan,250061
    4.School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei,066004
  • Received:2025-08-29 Online:2026-09-25 Published:2026-10-21
  • Contact: LIU Hanlian

摘要:

放电等离子烧结(SPS)技术的高升温速率会导致烧结系统产生较大的温度差异,进而影响烧结试样结构和性能的均匀性。借助COMSOL Multiphysics软件,通过引入PID算法,构建了温度随时间可控的二维热-电耦合有限元模型,并通过烧结实验验证了模型对电流场和温度场计算的可靠性与准确性。基于有效介质渗流理论,分析了添加的导电相TiCN含量对Si3N4基陶瓷刀具材料电导率的影响,并揭示了它对SPS烧结过程中电热行为的影响规律和机理。结果表明,导电相含量会显著影响烧结系统中的电流密度和温度分布,尤其是试样内部的温度分布,其中,烧结试样轴向温度表现出较好的一致性,但径向温度差异相对较大。利用这种温度差异调控试样径向的物相组成,有望实现烧结刀具材料径向微观组织及力学性能的适度调控。

关键词: 放电等离子烧结, 氮化硅, 导电相, 温度分布

Abstract:

The high heating rate of SPS technology might cause significant temperature differences within the sintering system, thereby affecting the uniformity of the structure and properties of sintered specimens. The COMSOL Multiphysics software was used to construct a two-dimensional thermo-electrical coupling finite element model with controllable temperature over time by introducing a PID algorithm. The reliability and accuracy of the model were verified through sintering experiments in calculating the current field and temperature field. The influence of the added conductive phase TiCN content on the electrical conductivity of Si3N4-based ceramic tool materials was analyzed based on effective medium percolation theory, revealing the patterns and mechanisms governing their electrothermal behavior during SPS sintering. Results indicate that the conductive phase content significantly influences current density and temperature distribution within the sintering system, particularly the internal temperature distribution of specimens. Axial temperature distribution exhibits good consistency, whereas radial temperature differences are relatively substantial. By using this temperature difference to regulate the phase composition in the radial direction, it is expected to moderately control the radial microstructure and mechanical properties of sintered tool materials.

Key words: spark plasma sintering(SPS), silicon nitride, conductive phase, temperature distribution

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