Formation mechanism and single abrasive wear of TaC dense ceramic layer on surface of gray cast iron
Formation mechanism and single abrasive wear of TaC dense ceramic layer on surface of gray cast iron
复制标题
灰铸铁表面TaC致密陶瓷层的形成机理及单次磨粒磨损
DOI：
10.1016/j.ceramint.2019.05.067
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发表时间：
2019-08
影响因子：
5.2
通讯作者：
Yonghong Fu
中科院分区：
文献类型：
--
作者：
Nana Zhao;Yurong Zhao;Jilin Li;Xin Wang;Yiqi Wei;Kai Tang;Jie Li;Yunhua Xu;Yonghong Fu
采用铸造-热处理工艺在灰铸铁表面原位制备TaC致密陶瓷层。使用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM) 和能量色散光谱 (EDS) 分析和确定 TaC 致密陶瓷的相组成、形貌和元素分布。利用透射电子显微镜（TEM）研究了Ta-TaC界面和TaC-Fe界面的微观结构和晶体结构，并利用聚焦离子束（FIB）技术制备了TEM样品。在TaC致密陶瓷层表面进行0~50N逐渐增加的载荷的划痕试验。利用划痕微观形貌、摩擦曲线和声发射曲线评价TaC致密陶瓷层的单磨粒磨损行为。结果表明，灰铸铁表面的TaC致密陶瓷层是通过灰铸铁中的C原子与钽板中的Ta原子原位反应而获得的。 TaC颗粒生长的主导机制是C原子扩散到Ta的八面体间隙中，TaC颗粒的生长方向是Ta板的法线方向。厚度为20μm的TaC致密陶瓷层可承载48.7N的临界载荷，经理论计算估算TaC致密陶瓷层对灰口铸铁基体的临界压应力为302.08MPa。 TaC致密陶瓷在48.7N临界载荷之前发生塑性变形，在48.7N临界载荷之后发生脆性断裂，TaC致密陶瓷的单一磨料磨损形式是切削磨损。
TaC dense ceramic layer on the surface of gray cast iron was prepared in situ using casting-heat treatment process. Phase composition, morphology, and element distribution of TaC dense ceramics were analyzed and determined using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectrometry (EDS). The microstructure and crystal structure of Ta–TaC interface and TaC–Fe interface were studied using transmission electron microscopy (TEM), and TEM samples were prepared using focused ion beam (FIB) technique. Scratch test with progressively increasing load of 0–50 N was conducted on the surface of TaC dense ceramic layer. Single abrasive wear behavior of TaC dense ceramic layer was evaluated using microscopic morphology of scratch, friction curve, and acoustic emission curve. Results show that TaC dense ceramic layer on gray cast iron surface was obtained via in situ reaction of C atoms in gray cast iron with Ta atoms in tantalum plate. Dominant mechanism for TaC particle growth is the diffusion of C atoms into the octahedral gap of Ta, and growth direction of TaC particles is the normal direction of Ta plate. TaC dense ceramic layer with a thickness of 20 μm can carry critical load of 48.7 N. The critical compressive stress of TaC dense ceramic layer on the gray cast iron matrix is estimated to be 302.08 MPa by theoretical calculation. The plastic deformation of TaC dense ceramic occurs before critical load of 48.7 N, and brittle fracture occurs after critical load of 48.7 N. The single abrasive wear form of TaC dense ceramic is the cutting wear.
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DOI：
10.1016/j.procir.2016.03.007
发表时间：
2016
期刊：
Procedia CIRP
影响因子：
--
作者：
Qinjian Zhang;Jianguo Cao;Huiying Wang
通讯作者：
Qinjian Zhang;Jianguo Cao;Huiying Wang
影响因子：
5.2
作者：
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通讯作者：
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DOI：
10.1016/j.matpr.2017.11.450
发表时间：
2018
期刊：
Materials Today: Proceedings
影响因子：
--
作者：
S. Madhavarao;C. Raju;G. S. Kumar
通讯作者：
S. Madhavarao;C. Raju;G. S. Kumar
影响因子：
4.7
作者：
Cao, Ya-bin;Zhi, Shi-xin;Qin, Cha
通讯作者：
Qin, Cha
影响因子：
5.3
作者：
C. Harvey;Simon Wang;Bo Yuan;R. Thomson;G. Critchlow
通讯作者：
C. Harvey;Simon Wang;Bo Yuan;R. Thomson;G. Critchlow