权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Graded plasma-anodised oxide coatings for wear and corrosion protection on titanium aluminides

用于对铝化钛进行磨损和腐蚀防护的分级等离子阳极氧化涂层

基本信息

批准号：
253127141
负责人：
Professor Dr.-Ing. Thomas Lampke
金额：
--
依托单位：
Professur Werkstoff- und Oberflächentechnik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/253127141?language=en
关键词：
Graded plasma anodised oxide coatings

项目摘要

Titanium aluminides show the potential to substitute Ni-based alloys in temperature ranges up to 800 °C. However, a broad use as light-weight construction materials - e.g. in aircraft turbines - is not yet opened up due to their brittleness at room temperature and their low resistances against wear as well as high-temperature oxidation. As a conclusion, protective coatings have to improve the wear and oxidation behaviour. To face these demands, the present project investigates the plasma-electrolytic anodic oxidation (PAO, or plasma-electrolytic oxidation PEO), that is already generally accepted in its application on tiitanium alloys. The scientific aim of the project is the development, investigation and description of a process that produces graded ceramic protive coatings on titanium aluminides that show alumina-rich top layers. This aim will be achieved by two separated scientific branches. The first approach investiagtes a two-staged process using a preliminary aluminium donator coating that will be fully oxidised during the plasma-electrolytic anodising to form a dense alumina protective top layer. The second approach investigates the influences of electrolyte additives (aluminates) to achieve a one-staged plasma-anodising process for the direct production of alumina-rich graded PAO coatings on titanium aluminides. Both approaches will provide basic knowledge concerning formation, microstructure and behaviour of PAO coatings on titanium aluminides.

钛铝化物显示出在高达800 °C的温度范围内替代镍基合金的潜力。然而，由于其在室温下的脆性和其低耐磨性以及高温氧化性，其作为轻质结构材料（例如在飞机涡轮机中）的广泛用途尚未开放。因此，保护涂层必须改善磨损和氧化行为。面对这些需求，本项目研究等离子体电解阳极氧化（PAO，或等离子体电解氧化PEO），这是已经普遍接受的应用在钛合金。该项目的科学目标是开发、研究和描述一种在钛铝化物上生产梯度陶瓷保护涂层的工艺，该涂层显示出富含氧化铝的顶层。这一目标将通过两个独立的科学分支来实现。第一种方法investigagtes一个两阶段的过程中使用的初步铝供体涂层，将完全氧化过程中的等离子体电解阳极化，形成致密的氧化铝保护顶层。第二种方法研究了电解质添加剂（铝酸盐）的影响，以实现一个阶段的等离子体阳极化过程中的直接生产的富氧化铝的梯度PAO涂层钛铝化物。这两种方法将提供有关钛铝化物上PAO涂层的形成、微观结构和行为的基本知识。