Development of Ultra-fine particle Depositon Method to Overlay Coating

超细颗粒沉积法堆焊工艺的发展

基本信息

批准号：
11650723
负责人：
NIWA Naotake
金额：
$ 1.73万
依托单位：
Kogakuin University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650723/
关键词：
coating titanium aluminum ultra-fine partticle 構造材料超音速ノズルガス中蒸発法

项目摘要

This study proposed the development of Ultra-fine Particle Deposition Method (UDM) as new coating technology for structural materials. UDM is proposed as a technique for handling ultra-fine particles. There are two physical stages in UDM : gas evaporation and vacuum deposition. During gas evaporation, the source material is evaporated to form ultra-fine particles in an inert gas ; ultra-fine particles are carried with the inert gas in carrier pipe by using gas flow issuing from pressure difference between evaporation chamber and the deposition chamber. In the deposition stage, the particles are deposited with the gas flow by nozzle joined the carrier pipe tip on the substrate in deposition chamber.We considered that carrier speed of ultra-fine particles deposited as controlling factor of film formation in this method. It is effective that gas flow velocity is accelerated in order to accelerate carrier speed of ultra-fine particles. Then supersonic nozzle in which gas flow velocity was supersonic jet accelerated was designed by assumption of one-dimensional isentropic flow in nozzle, and it was designed in Mach 3.6 in the nozzle exit.This study aims to form the metal films of pure titanium and aluminum by UDM using supersonic nozzle. The results obtained are as follows : (1) Removal of coarse particles formed by secondary agglomeration is necessary for producing metallic films of titanium and aluminum. (2) Growth rate of film is controlled by electric power to evaporate source metal. (3) Heating nozzle is effective for the formation of film without voids. (4) No cracks were formed by indenting the diamond indenter of micro Vickers hardness tester at the interface between substrate and coated film, which indicates strong adhesion between them. By the result of this study, the name of this method was changed from the Ultra-fine Particle Deposition Method to Supersonic Free-Jet PVD Method.

这项研究提出了超细颗粒沉积法（UDM）作为结构材料的新涂料技术的发展。提议UDM作为处理超细颗粒的技术。 UDM中有两个物理阶段：气体蒸发和真空沉积。在气体蒸发期间，蒸发源物质在惰性气体中形成超细颗粒。通过使用蒸发室和沉积室之间的压力差的气流，将载气的惰性气体与载气一起携带。在沉积阶段，将颗粒与喷嘴的气流沉积在沉积室中的底物上的载体管尖。为了加速超细颗粒的载体速度，气流速度加速加速是有效的。然后，通过假设喷嘴中的一维等速度流动设计，其气流速度是超音速射流加速的超音速喷嘴，并且在喷嘴出口的3.6中设计了它。该研究旨在形成使用SuperSonic nokuks的UDM纯钛和铝的金属膜。所获得的结果如下：（1）去除由二次聚集形成的粗颗粒对于产生钛和铝的金属膜所必需。（2）膜的增长率受电力控制以蒸发源金属。（3）加热喷嘴对于没有空隙的膜形成有效。（4）通过缩进底物和涂层膜之间的界面上的微维克硬度测试仪的钻石凹痕来形成裂缝，这表明它们之间的粘附很强。根据这项研究的结果，该方法的名称从超细粒子沉积方法更改为超音速自由喷射PVD方法。