Wenqiang Duan
Xi'an Jiaotong University
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Featured researches published by Wenqiang Duan.
Materials Technology | 2018
Fangcheng Wang; Kedian Wang; Buxiang Zheng; Xia Dong; Xuesong Mei; Jing Lv; Wenqiang Duan; Wenjun Wang
Abstract Recently graphene-based materials (GBMs) have gained tremendous attention for their enormous potentials for various functional devices due to their excellent physical and chemical properties. However, the cost effective synthesis and patterning of carbon nanomaterials are a challenge, which significantly restricts its applications. Therefore, straightforward preparation and processing of GBMs in a scalable approach is still a important goal. In recent years, laser direct writing (LDW) technique provides a powerful processing method for the broad application of laser-induced graphene (LIG) which does not rely on either high temperature or toxic chemicals. This article aims to update the latest results in this rapidly evolving field and to provide critical insights to inspire more exciting developments of LIG and its functionalization. Based on the interaction mechanisms and physical effects, we comparatively review the methods of preparation and functionalization of LIG, including inducing, structuring, doping and hybriding. In this progress report, the applications of LIG and its GBMs patterned by LDW technique were discussed in the fields of optoelectronic devices, energy storage devices, biosensors and biomimetic devices.
Laser-based Micro- and Nanoprocessing XII | 2018
Wenqiang Duan; Xuesong Mei; Wenjun Wang; Kedian Wang
This study presents the comparison of laser drilling of nickel based superalloy in air and vacuum environment. A 300W Nd:YAG laser was used to carry out the experimental study, pulse width and pulse peak power were studied of their influence on the hole quality and appearance, the experiments were respectively conducted in air and vacuum. It was found that the holes drilled in vacuum were much different to those drilled in air. Laser of shorter pulse width may drill the better holes in the air, but in the vacuum it was the pulse width around 1ms that produced holes of the best quality.
Radiation Effects and Defects in Solids | 2016
Wenqiang Duan; Kedian Wang; Xia Dong; Xuesong Mei; Wenjun Wang; Zhengjie Fan; Jing Lv
ABSTRACT Laser drilling by temporally modulated pulse is a promising technique and has many advantages compared with normal pulse drilling. In this work, the effect of modulated pulse comprising pre-heating front and sharp trail was mainly studied. The function of the former was to pre-melt the radiated material, and the latter was to expel the liquid melt from the molten pool, thus to form a blind hole. While the trail subpulse was kept constant, the difference in the pre-heating subpulse parameter could cause a considerable influence on the hole quality and drilling efficiency. The depth and volume of the molten pool were proportional to the pre-heating energy, and inversely proportional to the pre-heating duration. With pre-heating subpulses of proper parameters, the sharp trail subpulse was very effective in expelling the melt liquid, leaving only a small quantity of melt to re-solidify as the recast layer, which was observably thinner compared with the holes drilled using the normal pulse mode. In the pre-melting process, the directional melt flow and heat conduction were found to be the reasons why the deep melting phenomenon had occurred.
Surface & Coatings Technology | 2015
Zhengjie Fan; Kedian Wang; Xia Dong; Wenqiang Duan; Xuesong Mei; Wenjun Wang; Jianlei Cui; Jing Lv
The International Journal of Advanced Manufacturing Technology | 2015
Wenqiang Duan; Kedian Wang; Xia Dong; Xuesong Mei; Wenjun Wang; Zhengjie Fan
The International Journal of Advanced Manufacturing Technology | 2016
Jing Lv; Xia Dong; Kedian Wang; Wenqiang Duan; Zhengjie Fan; Xuesong Mei
International Journal of Machine Tools & Manufacture | 2016
Zhengjie Fan; Xia Dong; Kedian Wang; Wenqiang Duan; Rujia Wang; Xuesong Mei; Wenjun Wang; Jianlei Cui; Xin Yuan; Chengying Xu
Applied Surface Science | 2017
Fangcheng Wang; Kedian Wang; Xia Dong; Xuesong Mei; Zhaoyang Zhai; Buxiang Zheng; Jing Lv; Wenqiang Duan; Wenjun Wang
Materials Letters | 2017
Zhengjie Fan; Kedian Wang; Xia Dong; Wenqiang Duan; Rujia Wang; Xuesong Mei; Wenjun Wang; Jianlei Cui; Shuai Zhang; Chengying Xu
Archive | 2011
Kedian Wang; Wenqiang Duan; Xuesong Mei; Wenjun Wang; Shuxing Zhao; Bin Liu