摘要
对Al_(70)Co_(15)Ni_(10)Tb_5合金进行了静高压(7.0GPa)熔态(1700℃)淬火(冷却速率10 ̄(20)C/s)处理,首次观察到一个新十次准晶相关晶体相。该相属底心正交晶体,晶胞参数为2.28nm、b=1.60nm、c=5.46nm。通过高分辨像分析,给出了它的二维点阵模型。同时在样品中发现了尺寸均匀的纳米级非晶超微粒形成,超微粒为球形,直径30~40nm。
In this peper,we reported a new approximant of Al_(70)Co_(15)Ni_(10)Tb_5 decagonal qua-sicrystal obtained by quenching from melting state(1700℃)under high static pressure(7.0GPa) for the first time. The approximant is a B-type orthorhombic crystalline phase and itslattice parameters are a=2.28nm,b=1.6nm,c=5.46nm。A two-dimensional lattice model ofthe approximant is supposed by means of the high-resolution electron microscopy pattern. Besides,many ultrafine particles are found in this sample. They are spherical and their sizes are 30~40nm.
出处
《高压物理学报》
CAS
CSCD
北大核心
1995年第4期257-263,共7页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金和中国科学院北京电子显微镜实验室的资助
关键词
晶体
准晶相关相
静高压
纳米超微粒
crystalline approximant,high-static pressure,quench from fusion state, Al-CoNiTb,ultrafine particles.