热加工工艺
熱加工工藝
열가공공예
HOT WORKING TECHNOLOGY
2010年
6期
77-79
,共3页
复合热障涂层%La_2Zr_2O_7%NiCoCrAlY%力学性能
複閤熱障塗層%La_2Zr_2O_7%NiCoCrAlY%力學性能
복합열장도층%La_2Zr_2O_7%NiCoCrAlY%역학성능
thermal barrier coatings%La_2Zr_2O_7%NiCoCrAlY%mechanical properties
采用微弧等离子法在1Cr18Ni9钢基体上制备了La_2Zr_2O_7、NiCoCrAlY复合热障涂层.采用扫描电镜、X射线衍射仪、拉伸试验仪等仪器研究了涂层的显微结构及力学性能.结果表明:涂层表面较为平整,其中镶嵌有未完全熔化的La_2Zr_2O_7颗粒;涂层为典型的层状结构;涂层较为致密且分布有均匀的空隙、微裂纹及未完全熔化的颗粒等缺陷;La_2Zr_2O_7、NiCoCrAlY在喷涂过程中未发生化学反应,保留了各自的相结构;涂层中的La_2Zr_2O_7为烧绿石结构;涂层结合强度为31.9 MPa.
採用微弧等離子法在1Cr18Ni9鋼基體上製備瞭La_2Zr_2O_7、NiCoCrAlY複閤熱障塗層.採用掃描電鏡、X射線衍射儀、拉伸試驗儀等儀器研究瞭塗層的顯微結構及力學性能.結果錶明:塗層錶麵較為平整,其中鑲嵌有未完全鎔化的La_2Zr_2O_7顆粒;塗層為典型的層狀結構;塗層較為緻密且分佈有均勻的空隙、微裂紋及未完全鎔化的顆粒等缺陷;La_2Zr_2O_7、NiCoCrAlY在噴塗過程中未髮生化學反應,保留瞭各自的相結構;塗層中的La_2Zr_2O_7為燒綠石結構;塗層結閤彊度為31.9 MPa.
채용미호등리자법재1Cr18Ni9강기체상제비료La_2Zr_2O_7、NiCoCrAlY복합열장도층.채용소묘전경、X사선연사의、랍신시험의등의기연구료도층적현미결구급역학성능.결과표명:도층표면교위평정,기중양감유미완전용화적La_2Zr_2O_7과립;도층위전형적층상결구;도층교위치밀차분포유균균적공극、미렬문급미완전용화적과립등결함;La_2Zr_2O_7、NiCoCrAlY재분도과정중미발생화학반응,보류료각자적상결구;도층중적La_2Zr_2O_7위소록석결구;도층결합강도위31.9 MPa.
The La_2Zr_2O_7 and NiCoCrAlY thermal barrier coatings on 1Cr18Ni9 substrate were prepared by multi micro-arc plasma method. The microstructure and mechanical properties were studied by means of SEM, XRD and electron tensile tester. The results show that, the coating surface which scattered some semi-melted La_2Zr_2O_7 particles is smooth. The coatings have typical laminar structure, some pores, microcracks, and semi-melted particles. None chemistry reaction occurs between La_2Zr_2O_7 and NiCoCrAlY. La_2Zr_2O_7 in the coatings is still pyrochlore phase. The adherent strength of the coatings is 31.9 MPa.
