热喷涂技术
熱噴塗技術
열분도기술
Thermal Spray Technology
2015年
3期
25-29
,共5页
靳磊%崔向中%周海滨%周国栋%姜春竹%杨璟%尚凯文
靳磊%崔嚮中%週海濱%週國棟%薑春竹%楊璟%尚凱文
근뢰%최향중%주해빈%주국동%강춘죽%양경%상개문
Al2O3防腐涂层%Al2O3-40％TiO2防腐涂层%激光重熔%第一原理
Al2O3防腐塗層%Al2O3-40％TiO2防腐塗層%激光重鎔%第一原理
Al2O3방부도층%Al2O3-40％TiO2방부도층%격광중용%제일원리
Al2O3 anticorrosive coatings%Al2O3-40％TiO2 anticorrosive coatings%Laser remelting%First principle analysis
本文采用大气等离子喷涂方法在AZ91D镁合金基体上制备Al2O3和Al2O3-40%TiO2防腐涂层,然后采取激光重熔对涂层进行封孔.采用第一原理计算表明Al2O3涂层较Al2O3-40%TiO2涂层杨氏模量大、热膨胀系数小,因此激光重熔Al2O3涂层时,由于其杨氏模量高导致涂层内应力较大,Al2O3涂层极易开裂、剥落.
本文採用大氣等離子噴塗方法在AZ91D鎂閤金基體上製備Al2O3和Al2O3-40%TiO2防腐塗層,然後採取激光重鎔對塗層進行封孔.採用第一原理計算錶明Al2O3塗層較Al2O3-40%TiO2塗層楊氏模量大、熱膨脹繫數小,因此激光重鎔Al2O3塗層時,由于其楊氏模量高導緻塗層內應力較大,Al2O3塗層極易開裂、剝落.
본문채용대기등리자분도방법재AZ91D미합금기체상제비Al2O3화Al2O3-40%TiO2방부도층,연후채취격광중용대도층진행봉공.채용제일원리계산표명Al2O3도층교Al2O3-40%TiO2도층양씨모량대、열팽창계수소,인차격광중용Al2O3도층시,유우기양씨모량고도치도층내응력교대,Al2O3도층겁역개렬、박락.
Al2O3 and Al2O3-40%TiO2 anticorrosive coatings were prepared on AZ91D magnesium alloy substrate using atmospheric plasma spraying method, and then these coatings were sealed by laser remelting process. First principle investigations indicated that Al2O3 anticorrosive coatings had higher young's modulus, smaller thermal expansion coefficient than those of Al2O3-40%TiO2 coatings. As a result, Al2O3 coatings (due to high young's modulus) had larger internal stress and were easy to crack and peel off than Al2O3-40%TiO2 coatings during laser remelting.
