| 金属材料的高应变率塑性变形及纳米化 |
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| 引用本文： | 屠风华,潘晶,刘新才.金属材料的高应变率塑性变形及纳米化[J].宁波大学学报(理工版),2009,22(3):412-413. |
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| 作者姓名： | 屠风华 潘晶 刘新才 |
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| 作者单位： | 1. 宁波大学,材料科学与化学工程学院,浙江,宁波,315211;宁波大学,新型功能材料及其制备科学国家重点实验室培育基地,浙江,宁波,315211;宁波大学,理学院,浙江,宁波,315211
2. 宁波大学,材料科学与化学工程学院,浙江,宁波,315211;宁波大学,新型功能材料及其制备科学国家重点实验室培育基地,浙江,宁波,315211 |
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| 基金项目： | 国家重大基础研究前期专项，国家自然科学基金，浙江省自然科学基金，宁波市科技攻关项目 |
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| 摘 要： | 塑性变形方法是目前研究与制备金属纳米晶材料的技术方法之一，包括低应变率变形和高应变率变形2种．作者对金属材料在表面机械研磨和高能球磨这2种高应变率塑性变形条件下的微观组织演化及纳米晶形成机理的研究和最新进展进行了综述，旨在更好地理解该力学条件下金属材料的纳米化现象，以促进纳米材料的制备研究．
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| 关 键 词： | 高应变率塑性变形 微观组织演化 变形机理 |
Plastic Deformation and Nanocrystallization of Metallic Materials at High Strain Rate |
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| TU Feng-hua,PAN Jing,LIU Xin-cai.Plastic Deformation and Nanocrystallization of Metallic Materials at High Strain Rate[J].Journal of Ningbo University(Natural Science and Engineering Edition),2009,22(3):412-413. |
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| Authors: | TU Feng-hua PAN Jing LIU Xin-cai |
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| Institution: | ZHU Ya-bin, LI Yuan-yuan, LIU Yu-xin ( The Medical School, Ningbo University, Ningbo 315211, China ) |
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| Abstract: | Fabrication of appropriate scaffold is a key issue for tissue engineering research. In this paper, a software controlled electrospinning system currently in use is introduced. The system parameters such as polymer solution properties （viscosity and concentration）, and process parameters such as electric potential, solution flow rate, distance between the nozzle and collection screen, and ambient parameters are studied in a detail manner. Under conditions of optimal operation, uniform composite fibers of gelatin and polycaprolactone are fabricated with diameters ranging from around 250 to 660 nanometers. The composite fiber sheet produced from the proposed system features in good biocompatibility and mechanical properties from gelatin and polycaprolactone. |
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| Keywords: | electrospinning gelatin and polycaprolactone composite fiber tissue engineering scaffold |
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