摘要
用硅溶胶粘结剂在ZTA(氧化锆增韧氧化铝)陶瓷颗粒表面均匀附着Ni粉后与高锰钢粉混合压制成形,通过烧结工艺制备实心预制体,并浇注高锰钢液制备ZTA陶瓷颗粒增强高锰钢基复合材料。通过OM、SEM、XRD等分析手段分析预制体和复合材料的组织形貌及界面扩散行为。结果表明,高锰钢添加15%Ni后金属与陶瓷之间的润湿角θ由104.7°降低至46.5°,界面状态从不润湿变成润湿。Ni与Fe互溶形成FeNi固溶体,降低了Fe的表面能,Fe、Mn、Ni向陶瓷中扩散。随着预制体中Ni含量的提高,预制体基体组织和界面缺陷明显减少,硬度显著提高,15%Ni预制体基体硬度较无Ni预制体提高了30.3%。Ni改性ZTA增强高锰钢基复合材料的三体耐磨性远优于普通高锰钢,提高幅度为170%。
The surface of ZTA(zirconia toughened alumina)ceramic particles is uniformly adhered with Ni powder by silica sol binder,and then mixed with high manganese steel powder for compression molding.The solid preform is prepared by sintering process,and the ZTA ceramic particles reinforced high manganese steel matrix composite is prepared by casting high temperature molten steel.The microstructure and interfacial diffusion behavior of the preform and composite were analyzed by OM,SEM and XRD.The results show that the wetting angle between metal and ceramic after adding 15%Ni to high manganese steelθfrom 104.7°to 46.5°,the interface state changes from non-wetting to wetting.Ni and Fe dissolve each other to form FeNi solid solution,which reduces the surface energy of Fe,and Fe,Mn,Ni diffuse into ceramics.With the increase of Ni content in the preform,the matrix structure and interface defects of the preform are significantly reduced,and the hardness is significantly increased.The matrix hardness of 15%Ni preform is 30.3%higher than that of no Ni preform.The three body wear resistance of Ni modified ZTA reinforced high manganese steel matrix composite is much better than that of ordinary high manganese steel,with an increase of 170%.
作者
许国磊
李卫
易艳良
涂小慧
XU Guo-lei;LI Wei;YI Yan-liang;TU Xiao-hui(Institute of Advanced Wear&Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,Guangdong,China;National Joint Engineering Research Center of High Performance Metal Wear Resistant Materials Technology,Jinan University,Guangzhou 510632,Guangdong,China)
出处
《铸造》
CAS
北大核心
2023年第4期394-400,共7页
Foundry
基金
国家自然科学基金(52005217)
广东省教育厅大学研究平台和研究项目(2022ZDZX3003)
广东省基础与应用基础研究基金项目(2022A1515010091、2021A1515010523、2020A1515110020)
中央高校基础科学研究项目(No.21620334)。
关键词
ZTA
润湿性
元素扩散
高锰钢
金属/陶瓷界面
ZTA
wettability
element diffusion
high manganese steel
metal/ceramic interface
