Development of graded heat-resisting Ti base material by gas-deposition

气相沉积梯度耐热钛基材料的研制

• 批准号: 07650823
• 负责人: NIWA Naotake
• 金额: $ 1.47万
• 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: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650823/
• 关键词: graded material; titanium; titanium aluminide; high strength; density ratio; intermetallic compound; heat-resisting material

Titanium-aluminide is expected as a material for high-temperature use because it has the excellent properties up to 1000 degrees centigrade. For example, it increases strength with increase of temperature and keeps fairly good resistance to oxidation up to 900 degrees centigrade. However, the main reason not to get the reliability for actual usage is its low ductility at room temperature.The aim of this study is to develop the material that has the graded composition between the high temperature side of titanium-aluminide and the low temperature side of a titanium alloy so as to make up for the low ductility of titanium aluminide and reduce the thermal stress by gas deposition method.Gas deposition system has three chambers, two chambers are for evaporation of aluminum and titanium and one is for deposition of aluminum and titanium fine particles.The conditions of evaporation and gradation of titanium and alminum are elucidated through this study.

铝化钛由于具有高达1000摄氏度的优异性能，有望成为高温使用材料。例如，它随着温度的升高而增加强度，并且在高达900摄氏度的温度下仍保持相当好的抗氧化性。然而，未获得实际使用可靠性的主要原因是其室温延展性较低。本研究的目的是开发一种在铝化钛高温侧和钛合金低温侧之间具有梯度成分的材料，以弥补铝化钛的低延展性，并通过气相沉积方法降低热应力。气相沉积系统有三个室，两个室用于蒸发铝化钛。 铝和钛，一种是铝和钛细颗粒的沉积。通过本研究阐明了钛和铝的蒸发和分级条件。