高濂
,
宫本大树
无机材料学报
本文介绍了近几年来在日本迅速发展的放电等离子烧结技术，除概要地介绍了这种烧结新技术的原理和特点外，着重介绍了放电等离子烧结技术在制备梯度功能材料和快速烧结细晶粒陶瓷方面的重要应用，其中后者包括了作者最近在日本大阪府立产业技术研究所取得的部分研究结果．
关键词:
放电
,
plasma
,
sintering
Z.Y. Lu 1)
,
S.M.An 2)
,
B.H.Cuo 2)
,
W.M.Li 1)
,
Y.Mei
,
Y.L.Xia 2) and J.Xu 2) 1) Department of Mechanical Engineering
,
Yangzhou University
,
Yangzhou 225009
,
China 2) Dalian University of Technology
,
Dalian 116024
,
China
金属学报(英文版)
This study raised a new assisted technique used for chemical vapor deposition (CVD) in which a laser beam irradiated the surface of substrate and simultaneously the plasma surroundings created in the reactive room, but both laser and plasma were at lower energy level in order to perform easily. The chemical vapor deposition reaction could be performed only just using simultaneously above two assisted methods. If not, the reaction could not be performed, too. It is laser plasma assisted chemical vapor deposition (LPCVD). For these reasons, a LPCVD device had been designed and manufactured, and was carried on practical operation. The results indicated that this technique is successful and feasible. Acting on the system of SiH 4 NH 3 N 2 with both CO 2 laser and RF plasma, expectant film of silicon nitride had been obtained on the surface of stainless steel.
关键词:
CVD
,
null
,
null
,
null
S.C. Fan 1)
,
X.H. Wang 2)
,
J.J. Zhang 2) and J.M. Wan 2) 1)School of Mechanical Engineering
,
Tianjin University
,
Tianjin 300070
,
China 2)School of Mechanical Engineering
,
Hebei University of Technology
,
Tianjin 300130
,
China
金属学报(英文版)
Plasma spraying technics, a method of strengthening surfaces, shows advantages in wear-resistant, reducing friction, bearing corrosion and enduring higher temperature. While for the coating material, it is important to improve the ability of the functional coating. In this paper, a coating material of wear-resistant, bearing corrosion and enduring higher temperature in middle and low speed diesel is studied quantificationally with a uniform prescription design method, which reduced the test period as the test points distribute uniformly. An optimized combination is put forward of each part in the coating and a method to develop a new coating material is supplied.
关键词:
coating
,
null
,
null
,
null
钱中
,
杨帆
低温物理学报
针对微细颗粒物在低温氩等离子体中的荷电过程,基于单元粒子法和蒙特卡罗混合法,进行粒子模拟.通过统计到达颗粒表面的电子和离子数目,确定其净电荷量,并获得带电粒子空间分布与自洽电场.仿真表明:半径为5μm的颗粒在等离子体中荷电量约为27800 e,颗粒表面电势约为-8V,且在距表面20 μm范围内迅速衰减至0V.在颗粒附近,离子数密度始终大于电子数密度.离子数密度在近壁处迅速增至无扰动区数密度,而电子数密度则相对较慢地增大至背景浓度.此外,颗粒荷电量与粒径成正比.
关键词:
微细颗粒物
,
等离子体
,
荷电
,
粒子模拟
王静
,
贾彩霞
,
熊需海
,
任荣
,
陈平
高分子材料科学与工程
利用氧气等离子体处理芳纶纤维表面,采用溶液预浸渍工艺制备芳纶纤维增强含氮杂萘聚醚砜酮(PPESK)树脂基复合材料.利用X射线光电子能谱、原子力显微镜和短梁剪切等分析测试手段研究了等离子体时效性对芳纶纤维表面元素组成、表面形貌、表面粗糙度及纤维复合材料层间剪切强度(ILSS)的影响.结果表明,随着等离子体处理的纤维在空气中放置时间的延长,表面化学组成变化较大,表面形貌和表面粗糙度变化不大.经等离子体处理的纤维在空气中放置较短时间内,其复合材料界面性能基本保持,继续延长放置时间到10 d,ILSS值由52.0 MPa下降到43.9 MPa,下降了15.5％.
关键词:
芳纶
,
树脂基复合材料
,
等离子体
,
时效性
,
界面
黄健
,
王志
,
兰光
,
刘永喜
,
张贵新
工程热物理学报
建立了微波点火试验平台,实现了定容燃烧弹内的可燃混合气的微波点火燃烧.研究了不同初始压力、混合气浓度条件下的微波点火燃烧特性.试验结果表明,微波谐振产生等离子体可以在相对燃空当量比为0.65的稀薄混合气条件下实现稳定甲烷点火燃烧.当初始压力较低时,混合气容易被击穿,产生大量等离子体;当初始压力较高时,混合气难以被击穿,但着火后的燃烧速度较快.
关键词:
微波点火
,
等离子体
,
化学反应
,
燃烧
路平
,
陈晓
,
杨明
材料研究学报
将等离子体处理和连续浸渍法相结合,制备了一种界面结合良好的银-玻璃纤维复合材料.SEM、AFM和XRD等结果表明,银在玻璃纤维表面包覆均匀,具有良好的综合性能.与传统化学镀方法比较,该制备工艺新颖、简单.玻璃纤维经氧等离子体处理后,其表面活性羟基通过多重相互作用对银展现出强的吸附能力.镀层厚度可由简单的浸渍提拉时间调节.而且,与传统镀银工艺相比,该工艺制备的银-玻璃纤维复合材料表面银颗粒的活性较高.基于银良好的抗菌性和抗感染性,该类银-玻璃纤维复合材料在广谱抗菌方面具有潜在的应用价值.
关键词:
玻璃纤维
,
镀银
,
等离子体
,
复合材料
,
原子力显微镜
,
扫描电子显微镜
