物理学报2016，Vol.65Issue(14)：145201-1-145201-5,5.DOI:10.7498/aps.65.145201
ICP微等离子体射流在快速成形制造中的应用∗
Application of inductively coupled microplasma jet on rapid manufacturing
摘要
Abstract
Metal rapid manufacture has received great attention in recent decades. Energy source with high power density is requisite for the metal deposition. Atmospheric pressure inductively coupled microplasma jet is commonly characterized by high temperatures, which is one of excellent candidates for metal rapid manufacture on a micro scale. In this paper, we investigate the microplasma jet driven by a 150 MHz very-high-frequency power supply at at-mospheric pressure. A microplasma of 3 cm in length and about 3 mm in diameter can be produced at 90 W power applied, with gas temperatures above one thousand degree centigrade. The jet length rises first, and then decreases by increasing gas flow rate, showing a transition from laminar flow to turbulence. The jet length also increases by enhancing applied power, but then keeps a maximum value with further increasing power, which is attributed to the attainment of equilibrium between the energy absorption and losses in the transport process in plasma. Copper powders are carried by the argon flowing into plasma, and melted fast by the microjet. An alumina ceramic plate is used as a substrate, which is set on the substrate holder with a precisely controlled X-Y-Z manipulator. A copper spherical cap with 2 mm in diameter and a column with 1 cm in height are fabricated in a few seconds, respectively, on the alumina ceramic substrate. The Cu spherical cap is characterized by scanning electron microscopy. Particles obtained on the sample surface are far smaller than the source powders, indicating a melting process of copper powders in plasma, as well as high gas temperature exceeding the melting point of copper. The weak peak of Cu2+1O is present besides strong copper diffraction lines in X-ray diffraction pattern, suggesting that the weak oxidation happens during rapid fabrication.关键词
感应耦合微等离子体射流/微尺寸/金属快速成形Key words
inductively coupled microplasma jet/micro-size/rapid manufacturing引用本文复制引用
张一川,杨宽,李唤,朱晓东..ICP微等离子体射流在快速成形制造中的应用∗[J].物理学报,2016,65(14):145201-1-145201-5,5.基金项目
国家自然科学基金(批准号:11375192)资助的课题.* Project supported by the National Natural Science Foundation of China (Grant No.11375192) （批准号:11375192）
