日本金属学会誌

J. Japan Inst. Metals, Vol. 63, No. 9 (1999),
pp. 1105-1108

Formation of Coherent Tungsten Ultra-Fine Particle Arraysby Nd: YAG Laser Irradiation

Yuji Kawakami1, Shinya Sasaki2 and Eiichi Ozawa1

1Nano Particle Division, Vacuum Metallurgical Co., Ltd. Chiba 289-1297
2Mechanical Engineering Laboratory, AIST, MITI, Tsukuba 305-8564

Abstract:

W ultra-fine particles have been produced from W single crystal substrates using a Q-switch pulsed Nd: YAG laser and observed using a scanning electron microscopy (SEM) and atomic force microscopy (AFM). The laser irradiation was done in a low-pressure inert gas atmosphere. A new coherent array of W ultra-fine particles of about 500-800 nm are formed at and around a laser-irradiation marking. The coherent arrays are of the square type and rhombic type, and their directions are independent of the laser incident angle and polarization.


(Received April 23, 1999)

Keywords:

coherent array, laser irradiation, single crystal, tungsten, rapid solidification


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