激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2011年
4期
36-37
,共2页
脉冲激光沉积%相爆炸%激光等离子体冲击波%表面波纹
脈遲激光沉積%相爆炸%激光等離子體遲擊波%錶麵波紋
맥충격광침적%상폭작%격광등리자체충격파%표면파문
pulsed laser deposition%phase explosion: laser plasma shock wave%surface ripple
为了研究强激光辐照金属靶材料的效应,用纳秒激光脉冲烧蚀金属铜,对表面特征进行观测以及对其物理过程进行分析。研究发现:纳秒激光脉冲对金属铜作用时,热量沉积在金属表面很薄(几个微米)的范围,使得其温度分布由外到内分别为超热、汽化和熔化状态,由于激光脉冲的快速沉积,会发生剧烈的沸腾性爆炸(相爆炸)效应,形成较深的坑状破坏,同时汽化物在点坑周围再冷却,形成色变区。在熔化区域由于热张力作用,形成周期性波纹结构。在这个过程中,激光等离子体的冲击作用加速了汽化物的排出。
為瞭研究彊激光輻照金屬靶材料的效應,用納秒激光脈遲燒蝕金屬銅,對錶麵特徵進行觀測以及對其物理過程進行分析。研究髮現:納秒激光脈遲對金屬銅作用時,熱量沉積在金屬錶麵很薄(幾箇微米)的範圍,使得其溫度分佈由外到內分彆為超熱、汽化和鎔化狀態,由于激光脈遲的快速沉積,會髮生劇烈的沸騰性爆炸(相爆炸)效應,形成較深的坑狀破壞,同時汽化物在點坑週圍再冷卻,形成色變區。在鎔化區域由于熱張力作用,形成週期性波紋結構。在這箇過程中,激光等離子體的遲擊作用加速瞭汽化物的排齣。
위료연구강격광복조금속파재료적효응,용납초격광맥충소식금속동,대표면특정진행관측이급대기물리과정진행분석。연구발현:납초격광맥충대금속동작용시,열량침적재금속표면흔박(궤개미미)적범위,사득기온도분포유외도내분별위초열、기화화용화상태,유우격광맥충적쾌속침적,회발생극렬적비등성폭작(상폭작)효응,형성교심적갱상파배,동시기화물재점갱주위재냉각,형성색변구。재용화구역유우열장력작용,형성주기성파문결구。재저개과정중,격광등리자체적충격작용가속료기화물적배출。
In order to study the effect of laser irradiation on metal target material,it is analyzed the ablation process and the surface characteristics of metal materials analysis under the action of nanosecond laser pulse.The research shows that the heat deposited of nanosecond laser pulse in the metal surface is very thin(several micrometers),the temperature distribution from the outside to inside can be divided into superheated liquid,vaporization and melting state.Due to the rapid heat deposition of laser pulse,explosive boiling(phase explosion) will occur and deep pits will be formed.At the same time,the metal vapor will cooled around the hole and form a discoloration area.In the role of the region,the periodic ripple structure will be formed due to thermal tension.In this process,the role of laser plasma shock accelerated the discharge of vaporized material.