新型Co-Al-W基合金表面梯度Al-Cr、Al-Si复合涂层的高通量制备和氧化腐蚀行为高通量实验表征研究

热防护涂层高通量制备和氧化腐蚀行为高通量实验表征是快速筛选涂层成分的关键技术，是材料基因工程重要方向之一。申请人采用多弧离子镀技术在新型Co-Al-W基合金表面首次高通量制备了非平衡梯度Al-Cr复合涂层，建立了Al-Cr涂层显微组织与成分梯度的关系，但氧化腐蚀行为高通量表征相关理论和方法尚未建立，影响了Co-Al-W合金热防护技术快速发展。本项目拟用多弧离子镀在Co-Al-W上分别制备非平衡梯度Al-Cr、Al-Si复合涂层，开展超高温短时高通量氧化腐蚀行为研究，实现涂层优化成分快速筛选。用包埋渗法在Co-Al-W上制备近平衡优化Al-Cr、Al-Si涂层，研究服役温度下长期氧化腐蚀行为。建立非平衡Al-Cr、Al-Si涂层高通量制备-氧化腐蚀行为高通量表征-近平衡涂层高温氧化腐蚀性能关系，提出非平衡涂层指导抗氧化腐蚀涂层成分优化设计的原则，指导Co-Al-W合金热防护涂层技术快速发展。

The high-throughput preparation and high-throughput characterization on the anti-oxidation and -corrosion performance of gradient coatings is the key technology for rapid optimization and development of the coatings’ composition, which is also one of the most important issues of the genetic engineering of materials. We have firstly fabricated non-equilibrium gradient Al-Cr complex coatings on the novel Co-Al-W based superalloy substrates high-throughputly by using multi-arc ion plating technology and revealed the relationship between the gradient composition and the microstructures of the Al-Cr complex coatings. However, the theory and the technology of the high-throughput characterization on the oxidation and corrosion behaviors of the complex coatings have not been established yet, which strongly impede the fast development of the anti-oxidation and -corrosion technology of the novel Co-Al-W based superalloys. In this project, the non-equilibrium gradient Al-Cr and Al-Si complex coatings will be prepared by using multi-arc ion plating technology and their oxidation and corrosion tests are going to be high-throughputly conducted under the conditions of ultra-high temperature and short time. Subsequently, the rapid optimization of the coatings’ composition can be achieved based on the high-throughput tests. The near-equilibrium Al-Cr and Al-Si complex coatings with the optimized composition on the Co-Al-W based superalloys will be prepared by the pack cementation method and their long term oxidation and corrosion behaviors under the service temperatures, as well as failure modes, will be investigated. A relationship among the high-throughput preparation of non-equilibrium gradient Al-Cr and Al-Si complex coatings, high-throughput characterization on the oxidation and corrosion behaviors, and the anti-oxidation and -corrosion performance of the near-equilibrium Al-Cr and Al-Si complex coatings will be established, and finally, a principle with the characteristics of materials genetic engineering for the non-equilibrium coatings to high-throughputly optimize the coatings’ composition will be proposed, which is useful to guide quick development of the anti-oxidation and -corrosion coatings for the Co-Al-W based superalloys.