首先,以15vol％或25vol％的TiC0.5N0.5粉体为导电第二相,利用热压烧结法制备了TiC0.5N0.5/Si3N4 复相陶瓷;然后,分别通过物理气相沉积(PVD)和化学气相沉积(CVD)技术在TiC0.5N0.5/Si3N4陶瓷刀具表面沉积了CrAlN和TiN/Al2O3/TiN涂层;最后,通过对TiC0.5N0.5/Si3N4刀具进行连续切削灰铸铁实验,研究了TiC0.5N0.5含量和涂层类型对刀具磨损特征的影响,并探讨了刀具的磨损机制.结果表明:TiC0.5N0.5含量的增加有利于提高TiC0.5N0.5/Si3N4复相陶瓷刀具基体的硬度和电导率,但对耐磨性和切削寿命的影响较小;采用PVD技术沉积CrAlN涂层时,随着TiC0.5N0.5含量的增加,涂层的厚度、结合强度和硬度都得到提高,涂层刀具的磨损性能显著提高,切削寿命也明显延长;而采用CVD技术沉积TiN/Al2O3/TiN涂层时,TiC0.5N0.5含量的变化对涂层的厚度、结合强度和硬度基本没有影响,TiN/Al2O3/TiN涂层刀具整体切削性能变化不大.CrAlN涂层和TiN/Al2O3/TiN涂层都可明显改善TiC0.5N0.5/Si3N4复相陶瓷刀具的耐磨性和切削寿命;相对于TiN/Al2O3/TiN涂层,CrAIN涂层具有更高的涂层硬度和粘着强度,但TiN/Al2O3/TiN涂层具有较大的涂层厚度,TiN/Al2O3/TiN涂层刀具表现出更加优异的耐磨性和切削寿命.TiC0.5N0.5/Si3N4复相陶瓷刀具的磨损机制以机械摩擦导致的磨粒磨损为主,伴随有少量的粘结磨损.
参考文献
| [1] | 王宝友;崔丽华;黄传真;艾兴.两类陶瓷刀具的现状、性能与应用[J].陶瓷学报,2001(1):48-52. |
| [2] | 古尚贤;郭伟明;曾俊杰;伍尚华;蒋强国;高棱.Si3N4-TiC0.5N0.5复相陶瓷的制备及切削性能研究[J].人工晶体学报,2015(5):1259-1265. |
| [3] | 曾俊杰;刘伟;龙莹;古尚贤;李安琼;伍尚华.基于PVD-TiN和TiSiN涂层的Al2O3/TiCN陶瓷刀具及其切削性能研究[J].无机材料学报,2015(10):1089-1093. |
| [4] | Jie Qin;Ying Long;Junjie Zeng.Continuous and varied depth-of-cut turning of gray cast iron by using uncoated and TiN/Al_2O_3 coated silicon nitride-based ceramic tools[J].CERAMICS INTERNATIONAL,20148 Pt.A(8 Pt.A):12245-12251. |
| [5] | A. Osada;E. Nakamura;H. Homma.Wear mechanism of thermally transformed CVD Al_2O_3 layer[J].International Journal of Refractory Metals & Hard Materials,20065(5):387-391. |
| [6] | Kim CW.;Kim KH..ANTI-OXIDATION PROPERTIES OF TIALN FILM PREPARED BY PLASMA-ASSISTED CHEMICAL VAPOR DEPOSITION AND ROLES OF AL[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,19971/2(1/2):113-119. |
| [7] | L.A. Dobrzanski;D. Pakula;A. Kriz.Tribological properties of the PVD and CVD coatings deposited onto the nitride tool ceramics[J].Journal of Materials Processing Technology,20061/3(1/3):179-185. |
| [8] | L.A. Dobrzariski;D. Pakula.Comparison of the structure and properties of the PVD and CVD coatings deposited on nitride tool ceramics[J].Journal of Materials Processing Technology,20050(0):832-842. |
| [9] | 彭志坚;苗赫濯;齐龙浩;龚江宏;杨思泽;刘赤子.氮化硅陶瓷刀具表面涂覆高硬耐磨氮化钛涂层研究[J].稀有金属材料与工程,2004(5):507-511. |
| [10] | Zhiquan Guo;Gurdial Blugan;Rene Kirchner.Microstructure and electrical properties of Si_3N_4-TiN composites sintered by hot pressing and spark plasma sintering[J].CERAMICS INTERNATIONAL,20077(7):1223-1229. |
| [11] | 古尚贤;郭伟明;伍尚华;游洋;蒋强国;高棱.Si3N4-TiC和Si3N4-TiN复相导电陶瓷的制备及电加工性能研究[J].人工晶体学报,2015(4):1095-1100. |
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