激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2000年
1期
46-47,50
,共3页
等离子喷涂%Al2O3+13wt.％TiO2陶瓷涂层%激光重熔%显微硬度%耐磨性
等離子噴塗%Al2O3+13wt.％TiO2陶瓷塗層%激光重鎔%顯微硬度%耐磨性
등리자분도%Al2O3+13wt.％TiO2도자도층%격광중용%현미경도%내마성
plasma spraying%Al2O3+13wt％TiO2 ceramic coating%laser remelting%microhardness%wear resistance
本文用X射线衍射、扫描电镜和显微硬度研究了等离子喷涂Al2O3+13wt%TiO2陶瓷涂层激光重熔处理后陶瓷熔化层的组织结构及硬度变化特征。激光重熔区亚稳相-Al2O3转变成为稳定相α－Al2O3；TiO2与Al2O3反应生成TiAl2O5。陶瓷熔化层致密、无孔隙、少裂纹或无裂纹；熔化层硬度有较大提高，且随激光能量密度的增大而增大，而涂层设计对其影响很小。此外，激光重熔能极大地提高陶瓷涂层的耐磨性。
本文用X射線衍射、掃描電鏡和顯微硬度研究瞭等離子噴塗Al2O3+13wt%TiO2陶瓷塗層激光重鎔處理後陶瓷鎔化層的組織結構及硬度變化特徵。激光重鎔區亞穩相-Al2O3轉變成為穩定相α－Al2O3；TiO2與Al2O3反應生成TiAl2O5。陶瓷鎔化層緻密、無孔隙、少裂紋或無裂紋；鎔化層硬度有較大提高，且隨激光能量密度的增大而增大，而塗層設計對其影響很小。此外，激光重鎔能極大地提高陶瓷塗層的耐磨性。
본문용X사선연사、소묘전경화현미경도연구료등리자분도Al2O3+13wt%TiO2도자도층격광중용처리후도자용화층적조직결구급경도변화특정。격광중용구아은상-Al2O3전변성위은정상α－Al2O3；TiO2여Al2O3반응생성TiAl2O5。도자용화층치밀、무공극、소렬문혹무렬문；용화층경도유교대제고，차수격광능량밀도적증대이증대，이도층설계대기영향흔소。차외，격광중용능겁대지제고도자도층적내마성。
The microstructure and microhardness of the laser remelted layer of the plasma sprayed Al2O3+13wt.%TiO2ceramic coatings have been investigated using x-ray diffraction,scanning electronic microscope and microhardness measurements.After laser remelting,the metastable -Al2O3 in the remelting layer has transferred into stable phase α－Al2O3,meanwhile,the phase TiO2 reacts with Al2O3 and transfers to TiAl2O5.The remelted layer becomes very dense,porous-free and only a few or even no cracks exist.The hardness of the laser remelting layer has been largely developed and furthermore increases as the output energy density of laser goes up,however it is almost independent of the coating design.Additionally,the wear resistance of the ceramic coating has been greatly improved by laser remelting.
