热喷涂技术
熱噴塗技術
열분도기술
THERMAL SPRAY TECHNOLOGY
2015年
2期
22-33
,共12页
唐健江%白宇%张平%刘琨%王玉%杨晶%韩志海%丁秉钧%梁工英
唐健江%白宇%張平%劉琨%王玉%楊晶%韓誌海%丁秉鈞%樑工英
당건강%백우%장평%류곤%왕옥%양정%한지해%정병균%량공영
合金粘接层%结构设计%氧化%热循环%热生长氧化物
閤金粘接層%結構設計%氧化%熱循環%熱生長氧化物
합금점접층%결구설계%양화%열순배%열생장양화물
Bond coat%Structural design%Oxidation%Thermal cycle%TGOs
本研究旨在通过设计热障涂层体系(TBCs)中合金粘接层的结构以提高TBCs抗氧化性能和热循环使用寿命。研究中采用超音速等离子喷涂(SAPS)沉积不同结构的钴基及镍基合金涂层并对其进行高温氧化性能试验,以此优选涂层结构,并与超音速火焰喷涂(HVOF)沉积的合金涂层进行结构性能对比。结果表明:在高温抗氧化过程中,SAPS涂层中未熔颗粒含量分别为35%±5%的钴基涂层与10%±3%的镍基涂层抗氧化性能最为优异;在相同的合金成分及陶瓷层结构下,SAPS涂层与HVOF涂层相比热循环使用寿命提高了一倍,而热生长氧化物(TGOs)的平均生长速率则降低了20%以上。超音速等离子喷涂可以实现“一步法”制备粘结层和陶瓷层,避免了两步法中间工艺转换过程的二次污染问题,喷涂过程简单,喷涂效率提高,成本大幅降低,具有良好的产业化前景。
本研究旨在通過設計熱障塗層體繫(TBCs)中閤金粘接層的結構以提高TBCs抗氧化性能和熱循環使用壽命。研究中採用超音速等離子噴塗(SAPS)沉積不同結構的鈷基及鎳基閤金塗層併對其進行高溫氧化性能試驗,以此優選塗層結構,併與超音速火燄噴塗(HVOF)沉積的閤金塗層進行結構性能對比。結果錶明:在高溫抗氧化過程中,SAPS塗層中未鎔顆粒含量分彆為35%±5%的鈷基塗層與10%±3%的鎳基塗層抗氧化性能最為優異;在相同的閤金成分及陶瓷層結構下,SAPS塗層與HVOF塗層相比熱循環使用壽命提高瞭一倍,而熱生長氧化物(TGOs)的平均生長速率則降低瞭20%以上。超音速等離子噴塗可以實現“一步法”製備粘結層和陶瓷層,避免瞭兩步法中間工藝轉換過程的二次汙染問題,噴塗過程簡單,噴塗效率提高,成本大幅降低,具有良好的產業化前景。
본연구지재통과설계열장도층체계(TBCs)중합금점접층적결구이제고TBCs항양화성능화열순배사용수명。연구중채용초음속등리자분도(SAPS)침적불동결구적고기급얼기합금도층병대기진행고온양화성능시험,이차우선도층결구,병여초음속화염분도(HVOF)침적적합금도층진행결구성능대비。결과표명:재고온항양화과정중,SAPS도층중미용과립함량분별위35%±5%적고기도층여10%±3%적얼기도층항양화성능최위우이;재상동적합금성분급도자층결구하,SAPS도층여HVOF도층상비열순배사용수명제고료일배,이열생장양화물(TGOs)적평균생장속솔칙강저료20%이상。초음속등리자분도가이실현“일보법”제비점결층화도자층,피면료량보법중간공예전환과정적이차오염문제,분도과정간단,분도효솔제고,성본대폭강저,구유량호적산업화전경。
This paper aims to improve the anti-oxidation and thermal cycling life of thermal barrier coating system (TBCs) by tailoring the microstructure of MCrAlYbond coat. The cobalt-based and nickel-basedbond coats were deposited byhigh efficiency supersonic atmospheric plasma spraying (SAPS) system. The microstructures of bond coats were optimized by ahigh-temperature oxidation test. A comparative study between SAPS-coating and HVOF-coating (high velocity oxygen fuel spraying, HVOF) was conducted in order to analyze the microstructure-property differences between them. The results showed that the SAPS-coatings that remained 35%± 5%(cobalt-based) and 10%± 3%(nickel-based) unmelted particles exhibited the best oxidation resistance. For the same composition of bond coat and microstructure of top coat, the thermal cycling life of SAPS-coating was two times as much as that of HVOF-coating, however, the average growth rate of thermally grown oxides (TGOs) was reduced by more than 20%. The SAPS can“one-step” deposit the bond coat and top coat , whicheffectively avoids the pollution resulted from the so-called “two-step”process method. With the advantages of simple process, high deposition efficiency and low production cost, the SAPS method shows a good industrial prospect.