Current and Next-Generation Titanium Blade Compatible Compressor Abradable Coatings
Current and Next-Generation Titanium Blade Compatible Compressor Abradable Coatings
复制标题
当前和下一代钛合金叶片兼容压缩机耐磨涂层
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
D. Sporer
中科院分区：
文献类型：
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作者：
D. Sporer
在宽范围的侵入条件下与裸露的、无尖端的钛合金转子叶片操作接触的压缩机耐磨材料需要优异的可切割性，以便避免叶片尖端由于磨损和过热而损坏。这对于可以利用低剪切强度铝基体的低温系统比对于在更接近先进钛合金叶片材料的最大允许温度下操作的压缩机可磨耗件更容易实现。在这种情况下，转子路径衬里将不得不包含耐高温的Ni和Co合金基体。为此，能够在高达550°C的温度下工作，同时在整个使用寿命期间显示出很小的热老化效应和优异的耐磨性的可磨损涂层的可用性可能会影响压缩机叶片材料的选择，从而影响压缩机重量和性能特征。本文概述了钛叶片友好型压气机耐磨概念。特别强调的是在役涂层和下一代涂层的耐磨性，这些涂层设计用于达到钛叶片转子材料的耐温能力及更高温度。候选涂层也筛选其他性能标准，如热循环阻力和老化行为。
Compressor abradables coming into operational contact with bare, un-tipped titanium alloy rotor blades over a wide range of incursion conditions require excellent cuttability in order to avoid blade tip damage by wear and over-heating. This is more easily achieved for low temperature systems that can make use of low shear strength aluminum matrices than for compressor abradables operating closer to the maximum allowable temperature of advanced titanium alloy blade materials. In this case the rotor path linings will have to incorporate higher temperature resistant Ni and Co alloy matrices. To that end the availability of abradable coatings capable of operating at up to 550°C while showing little thermal ageing effects and excellent abradability over their entire service life can influence the compressor blade material selection and therefore compressor weight and performance characteristics. This paper provides an overview of titanium blade friendly compressor abradable concepts. Particular emphasis will be placed on the abradability of in-service and next-generation coatings designed for use up to the temperature capability of Ti blade rotor materials and beyond. Candidate coatings are also screened for other performance criteria such as thermal cyclic resistance and ageing behaviour.