The icosahedral quasicrvstalline phase (i-phase) with the chemical composition of 82.4at%Al. 8.8at%Fe. 3.6at%V and 5.2at%Si in melt spun Al-Fe-V-Si ribbons was found. It is suggested that the temperature and holding t...The icosahedral quasicrvstalline phase (i-phase) with the chemical composition of 82.4at%Al. 8.8at%Fe. 3.6at%V and 5.2at%Si in melt spun Al-Fe-V-Si ribbons was found. It is suggested that the temperature and holding time of the melt prior to quenching are the important factors in the formation of the i-phase.展开更多
The ordering of the α-Fe(Si) crystallization phase in annealed Fe73.5Cu1Mo3Si13.5B9 alloy has been studied using XRD method. The α-Fe(Si) phase in Fe73.5Cu1Mo3Si13.5B9 alloy annealed at 460℃ for 1 h consists of th...The ordering of the α-Fe(Si) crystallization phase in annealed Fe73.5Cu1Mo3Si13.5B9 alloy has been studied using XRD method. The α-Fe(Si) phase in Fe73.5Cu1Mo3Si13.5B9 alloy annealed at 460℃ for 1 h consists of the DO3-type ordered region with spherical shape and disordered region. The size of DO3 ordered region increases with the annealing temperature. When the annealing temperature is 560℃, the size of the ordered region in the α-Fe(Si) grain is 14.0nm,which is nearly as large as that of the α-Fe(Si) grain (14.2 nm) and the degree of order of the α-Fe(Si) phase is about 0.78. When Fe73.5Cu1 Mo3Si13.5B9 amorphous alloy is annealed at 520℃， with the increment of the annealing time, the shape of the DO3 ordered region in the α-Fe(Si) phase is spheroidal at the beginning of the annealing and becomes spherical and has asize of 12.8 nm when the annealing time is 60 min. In addition, the DO3 superlattice lines of the α-Fe(Si) phase will vanish if Fe73.5Cu1Mo3Si13.5 B9 amorphous alloy is annealed for 1 h at 750℃.展开更多
研究了热处理对La Fe Si化合物组织结构的影响。结果表明,热处理保温时间在24h以内及温度在900～1300℃之间,铸态试样在两个温度点发生相变,即900～1200℃为一个相变点,α Fe相从铸态的非主相变为主相;1300℃为另一个相变点。在900～110...研究了热处理对La Fe Si化合物组织结构的影响。结果表明,热处理保温时间在24h以内及温度在900～1300℃之间,铸态试样在两个温度点发生相变,即900～1200℃为一个相变点,α Fe相从铸态的非主相变为主相;1300℃为另一个相变点。在900～1100℃范围材料中α Fe相的晶胞常数逐渐减小,当热处理温度继续增加,其α Fe相的晶胞常数缓慢增加。展开更多
基金financially supported by the Fundamental Research Funds for the Central Universities,China(No.2020CDJDPT001)the Chongqing Natural Science Foundation,China(No.cstc2021jcyj-msxm X0699)。
基金financially supported by the National Key Research and Development Program of China (No. 2020YFA0405903)the National Natural Science Foundation of China (Nos. 52001159, 52101141)+1 种基金the Natural Science Foundation of Jiangsu ProvinceChina (No. BK20202010)。
文摘The icosahedral quasicrvstalline phase (i-phase) with the chemical composition of 82.4at%Al. 8.8at%Fe. 3.6at%V and 5.2at%Si in melt spun Al-Fe-V-Si ribbons was found. It is suggested that the temperature and holding time of the melt prior to quenching are the important factors in the formation of the i-phase.
文摘The ordering of the α-Fe(Si) crystallization phase in annealed Fe73.5Cu1Mo3Si13.5B9 alloy has been studied using XRD method. The α-Fe(Si) phase in Fe73.5Cu1Mo3Si13.5B9 alloy annealed at 460℃ for 1 h consists of the DO3-type ordered region with spherical shape and disordered region. The size of DO3 ordered region increases with the annealing temperature. When the annealing temperature is 560℃, the size of the ordered region in the α-Fe(Si) grain is 14.0nm,which is nearly as large as that of the α-Fe(Si) grain (14.2 nm) and the degree of order of the α-Fe(Si) phase is about 0.78. When Fe73.5Cu1 Mo3Si13.5B9 amorphous alloy is annealed at 520℃， with the increment of the annealing time, the shape of the DO3 ordered region in the α-Fe(Si) phase is spheroidal at the beginning of the annealing and becomes spherical and has asize of 12.8 nm when the annealing time is 60 min. In addition, the DO3 superlattice lines of the α-Fe(Si) phase will vanish if Fe73.5Cu1Mo3Si13.5 B9 amorphous alloy is annealed for 1 h at 750℃.
