您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 8    No. 2    June 1998

[PDF Download]    [Flash Online]

    

GROWTH MORPHOLOGIES OF QUASICRYSTALLINE PHASE IN A BULK UNDERCOOLED Al-Mn-(Si,B) ALLOY
Song Guangsheng, Yang Gencang and Zhou Yaohe

State Key Lab of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, P. R. China

Abstract:The complex method of glass covering, salt denucleating and multiple superheating-cooling has been successfully applied to undercool the melt of a bulk Al-Mn-(Si,B) alloy and initiate quasicrystalline phase at an undercooling of 100 K. Growth morphologies of the quasicrystalline phase were characterized by using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). SEM and TEM imagies indicate 5-fold and 3-fold symmetric faceting dendrites, and dendrite elements and polyhedron particles, respectively. The constitution level and relation to m3 5 point group symmetry of growth morphology for the undercooled quasicrystalline phase have been reported for the first time.

 

Key words: Al-Mn-(Si,B) high undercooling quasicrystalline phase growth morphology

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn