Development of Fiber Reinforced Titanium Matrix Composite material by Gas Deposition Method

FRM纤维增强金属（Fiber Reinforced Metal）是提高金属材料力学性能的一种有效方法，但金属基体与纤维之间的反应难以控制，本研究旨在评价气相沉积法（GDM）制备钛基纤维增强金属材料的可行性。在惰性气体气氛中蒸发材料形成的超细颗粒进入高真空室，并以高存款率存款到基底上GDM赋予超细颗粒高动能，可以制备高密度的厚膜。由于它没有凝固过程，所以可以控制金属基体与纤维之间的反应。1997年，我们研究了加热条件、惰性气体流量和蒸发室与沉积室之间压力差的影响，阐明了装置控制参数与存款速率的关系。1998年，制备了钛基FRM复合材料，并对其进行了评价.沉积钛与钛基体结合力高.通过改进多余颗粒的排出系统，使超细颗粒的分散度变小.超微粒子尺寸的分散性对熔敷金属与纤维的结合力有很大的影响，高精度地控制超微粒子的尺寸分布和存款系统（基体台和喷嘴）是应用GDM制备FRM的关键技术。

FRM(Fiber Reinforced Metal) is a candidate to improve the mechanical properties of metallic materials, however, It is difficult to control the reaction between metallic matrix and fibers.This study aimed to evaluate Gas Deposition Method (GDM) as a practical method to produce titanium matrix FRM.In GDM, ultrafine particles formed by evaporating materials in inert gas atmosphere move Into high vacuum chamber and deposit to substrate with high deposit rate.GDM gives high kinetic energy to ultrafine particles and can make thick film with high density. As ft does not have solidification process, it can control the reaction between metallic matrix and fibers.In 1997, we made study on the effects of heating condition, flow rate of Inert gas and difference of pressure between chambers of evaporation and deposition.We elucidated the relation between control parameters of the apparatus and deposit rate.In 1998, we made titanium matrix FRM and evaluated them.The results of this study are as follows.1. The cohesion between deposited titanium and titanium substrate Is high.2. Dispersion of ultrafine particle size becomes small, by Improving the system that exhausts surplus particles.3. The dispersion of size of ultrafine particle has the effect on the cohesion between deposited metal and fiber.We conclude that key technology to apply GDM for producing FRM is to control particle size distribution and the deposit system (substrate stage and nozzle) three-dimensionally In high accuracy.