The femtosecond laser micro-processing of the field-emission tip arrays in single crystal CeB6 - 文章详情页

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EI SCIE

摘要：

The　field-emission　tip　arrays　(FEAs)　in　single　crystal　cerium-hexaboride　(CeB6)　were　micro-processed　by　femtosecond　laser.　The　results　show　that　the　femtosecond　laser　has　no　damage　to　the　surface　structure　and　phase　of　the　CeB6　FEAs,　and　the　FEA　with　the　curvature　radius　of　the　optimal　tips　of　about　0.6　μm　and　the　height　of　about　5　μm　have　uniform　morphology　and　the　best　field-emission　performance.　The　single　crystal　CeB6　FEAs　had　good　emission　stability　under　the　following　conditions:　the　starting　electric　field　of　2.8　V/μm　and　an　emission　current　density　of　0.98　A/cm2　at　an　electric　field　of　7.7　V/μm.　The　calculations　of　material　removal　threshold　and　finite　element　simulation　of　the　temperature　field　substantiate　that　laser　peak　energy　density　F0=0.95　J/cm2　is　in　good　agreement　with　the　theoretical　calculation　result　(0.51　J/cm2≤F0　≤　2.12　J/cm2).　Finally,　the　best　process　parameter　range　of　this　experiment　is　obtained.　These　results　further　indicating　that　the　femtosecond　laser　micro-processing　is　an　effective　method　to　develop　the　vacuum　field-emission　application　of　single　crystal　CeB6.　©　2020　Elsevier　Ltd

关键词：

Cerium compounds Electric fields Femtosecond lasers Field emission Morphology Single crystals Surface structure

作者机构：

[ 1 ] [Zhou, Ning]Faculty of Materials and Manufacturing, Beijing University of Technology, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing; 100124, China
[ 2 ] [Zhang, Wei]AVIC Beijing Research Institute of Aviation Engineering, Beijing; 100024, China
[ 3 ] [Zhang, Xin]Faculty of Materials and Manufacturing, Beijing University of Technology, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing; 100124, China
[ 4 ] [Liu, Hongliang]Faculty of Materials and Manufacturing, Beijing University of Technology, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing; 100124, China
[ 5 ] [Liu, Hongliang]Anyang Institute of Technology, Anyang; 455000, China
[ 6 ] [Lu, Qingmei]Faculty of Materials and Manufacturing, Beijing University of Technology, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing; 100124, China
[ 7 ] [Xiao, Yixin]Faculty of Materials and Manufacturing, Beijing University of Technology, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing; 100124, China
[ 8 ] [Liu, Yanqin]Faculty of Materials and Manufacturing, Beijing University of Technology, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing; 100124, China
[ 9 ] [Jin, Shengli]Montanuniverstaet Leoben, 8700, Austria
[ 10 ] [Liao, Ning]The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan; 430081, China

通讯作者信息：

[liu, hongliang]anyang institute of technology, anyang; 455000, china;;[liu, hongliang]faculty of materials and manufacturing, beijing university of technology, key laboratory of advanced functional materials, ministry of education, beijing; 100124, china

电子邮件地址：

qmlu@bjut.edu.cnemail20200020@ayit.edu.cn) Liu, Hongliang(20200020@ayit.edu.cn

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