强流脉冲电子束作用下纯镍表层中织构及结构缺陷的演化行为

李艳; 顾倩倩; 邱冬华; 彭冬晋; 关庆丰

doi:10.11858/gywlxb.2010.06.010

强流脉冲电子束作用下纯镍表层中织构及结构缺陷的演化行为

doi: 10.11858/gywlxb.2010.06.010

1.
江苏大学材料学院，江苏镇江 212013；
2.
吉林大学超硬材料国家重点实验室，吉林长春 130012

详细信息

通讯作者:
关庆丰

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出版历程
- 收稿日期: 2009-11-02
- 修回日期: 2010-06-22
- 刊出日期: 2010-12-15

Texture and Structural Defect Evolution of Pure Nickel Subjected to High-Current Pulse Electron Beam Irradiation

1.
School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
2.
State Key Laboratory of Superhard Materials, Jilin University, Changchun, 130012, China

More Information

Corresponding author: GUAN Qing-Feng

摘要

摘要: 利用强流脉冲电子束（HCPEB）装置对金属纯Ni进行轰击，采用X射线衍射及透射电子显微镜（TEM）技术详细分析了受轰击样品的变形结构和缺陷。X射线衍射分析表明，经强流脉冲电子束处理后，在{111}和{200}晶面出现了择优取向。TEM表层微观结构分析表明：强流脉冲电子束轰击1次和5次后，晶粒内部形成了大量的(111)[112]型波状条带结构，在波状条带内部包含大量平行的(200)[110]型微条带；10次轰击后，样品变形结构发生变化，除大量的条带状结构外，变形孪晶的数量明显增多。这些变形微结构不仅影响表层的织构演化行为，而且还能细化晶粒，强流脉冲电子束技术为制备表面纳米材料提供了一条有效的途径。
- 强流脉冲电子束 /
- 纯镍 /
- 织构 /
- 位错墙 /
- 结构缺陷
Abstract: The specimens of polycrystalline nickel were irradiated with high-current pulsed electron beam (HCPEB). Surface textures and structural defects of irradiated nickel were investigated by using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The XRD results show that the characteristics of preferential orientation {111} and {200} are presented after HCPEB treatments. While the treating pulses were chosen as 1 and 5 times, the surface microstructure changes after irradiation was analyzed by TEM. Within the surface layer the (111) [112] type of wave shear bands are formed in the interior of grains. Large numbers of (200) [110] types of micro-bands parallel each other embed in the wave bands. After 10 pulses, the deformation structure changed prominently. Besides the wave bands, the number of deformation twins increase evidently. The formation of these deformation structures has a significant effect both on the evolution of surface textures and grains refinement. It is suggested that HCPEB technique is becoming an effective approach to fabricate surface nanocrystalline materials.
- high-current pulsed electron beam /
- pure nickel /
- texture /
- dislocation wall /
- structural defect

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参考文献(12)

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