Effects of Si and Mo additions on glass-forming in FeGaPCB bulk glassy alloys with high saturation magnetization
Effects of Si and Mo additions on glass-forming in FeGaPCB bulk glassy alloys with high saturation magnetization
复制标题
DOI：
10.1103/physrevb.73.104204
复制
发表时间：
2006-03
影响因子：
3.7
通讯作者：
B. Shen;Masahiro Akiba;A. Inoue
中科院分区：
文献类型：
--
作者：
B. Shen;Masahiro Akiba;A. Inoue
We investigated the effect of Si and Mo additions on the glass-forming ability (GFA) of $\mathrm{Fe}\text{\ensuremath{-}}\mathrm{Mo}\text{\ensuremath{-}}\mathrm{Ga}\text{\ensuremath{-}}\mathrm{P}\text{\ensuremath{-}}\mathrm{C}\text{\ensuremath{-}}\mathrm{B}\text{\ensuremath{-}}\mathrm{Si}$ alloys. The simultaneous addition of small amounts of Si and Mo was found to be effective for extension of the supercooled liquid region $(\mathrm{\ensuremath{\Delta}}{T}_{x})$ defined by the difference between glass transition temperature $({T}_{g})$ and crystallization temperature $({T}_{x})$. The $\mathrm{\ensuremath{\Delta}}{T}_{x}$ value is $26\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for the ${\mathrm{Fe}}_{78}{\mathrm{Ga}}_{2}{\mathrm{P}}_{12}{\mathrm{C}}_{4}{\mathrm{B}}_{4}$ glassy alloy, and increases to 52 and $50\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for the ${\mathrm{Fe}}_{76}{\mathrm{Mo}}_{2}{\mathrm{Ga}}_{2}{\mathrm{P}}_{10}{\mathrm{C}}_{4}{\mathrm{B}}_{4}{\mathrm{Si}}_{2}$ and ${\mathrm{Fe}}_{74}{\mathrm{Mo}}_{4}{\mathrm{Ga}}_{2}{\mathrm{P}}_{10}{\mathrm{C}}_{4}{\mathrm{B}}_{4}{\mathrm{Si}}_{2}$ glassy alloys, respectively. Similarly, the $\mathrm{\ensuremath{\Delta}}{T}_{x}$ value is $33\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for the ${\mathrm{Fe}}_{77}{\mathrm{Ga}}_{3}{\mathrm{P}}_{12}{\mathrm{C}}_{4}{\mathrm{B}}_{4}$ glassy alloy, and increases to 60 and $57\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for the ${\mathrm{Fe}}_{75}{\mathrm{Mo}}_{2}{\mathrm{Ga}}_{3}{\mathrm{P}}_{10}{\mathrm{C}}_{4}{\mathrm{B}}_{4}{\mathrm{Si}}_{2}$ and ${\mathrm{Fe}}_{73}{\mathrm{Mo}}_{4}{\mathrm{Ga}}_{3}{\mathrm{P}}_{10}{\mathrm{C}}_{4}{\mathrm{B}}_{4}{\mathrm{Si}}_{2}$ glassy alloys, respectively. These four glassy alloys also exhibit rather high reduced glass transition temperature $({T}_{g}∕{T}_{l})$ of 0.58\char21{}0.60. By copper mold casting, bulk glassy alloy rods with the diameters of 1.5 to $2.5\phantom{\rule{0.3em}{0ex}}\mathrm{mm}$ were prepared. These four glassy alloys also exhibit high saturation magnetization $({I}_{s})$ of $1.11\char21{}1.32\phantom{\rule{0.3em}{0ex}}\mathrm{T}$ and good soft-magnetic properties, i.e., low coercive force $({H}_{c})$ of $2.4\char21{}3.3\phantom{\rule{0.3em}{0ex}}\mathrm{A}∕\mathrm{m}$, and high effective permeability $({\ensuremath{\mu}}_{e})$ at $1\phantom{\rule{0.3em}{0ex}}\mathrm{kHz}$ of $8500\char21{}14\phantom{\rule{0.2em}{0ex}}000$. The relation between crystallization behavior and GFA was also investigated. It was found that the primary precipitation phase of the $\mathrm{Fe}\text{\ensuremath{-}}\mathrm{Mo}\text{\ensuremath{-}}\mathrm{Ga}\text{\ensuremath{-}}\mathrm{P}\text{\ensuremath{-}}\mathrm{C}\text{\ensuremath{-}}\mathrm{B}\text{\ensuremath{-}}\mathrm{Si}$ glassy alloys is a complex fcc $(\mathrm{Fe},\mathrm{Mo}{)}_{23}(\mathrm{B},\mathrm{C}{)}_{6}$ phase, and the addition of small amounts of Si and Mo is effective for the suppression of precipitation of $(\mathrm{Fe},\mathrm{Mo}{)}_{23}(\mathrm{B},\mathrm{C}{)}_{6}$ phase, resulting in the extension of $\mathrm{\ensuremath{\Delta}}{T}_{x}$ and the improvement of GFA.
We investigated the effect of Si and Mo additions on the glass-forming ability (GFA) of $\mathrm{Fe}\text{\ensuremath{-}}\mathrm{Mo}\text{\ensuremath{-}}\mathrm{Ga}\text{\ensuremath{-}}\mathrm{P}\text{\ensuremath{-}}\mathrm{C}\text{\ensuremath{-}}\mathrm{B}\text{\ensuremath{-}}\mathrm{Si}$ alloys. The simultaneous addition of small amounts of Si and Mo was found to be effective for extension of the supercooled liquid region $(\mathrm{\ensuremath{\Delta}}{T}_{x})$ defined by the difference between glass transition temperature $({T}_{g})$ and crystallization temperature $({T}_{x})$. The $\mathrm{\ensuremath{\Delta}}{T}_{x}$ value is $26\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for the ${\mathrm{Fe}}_{78}{\mathrm{Ga}}_{2}{\mathrm{P}}_{12}{\mathrm{C}}_{4}{\mathrm{B}}_{4}$ glassy alloy, and increases to 52 and $50\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for the ${\mathrm{Fe}}_{76}{\mathrm{Mo}}_{2}{\mathrm{Ga}}_{2}{\mathrm{P}}_{10}{\mathrm{C}}_{4}{\mathrm{B}}_{4}{\mathrm{Si}}_{2}$ and ${\mathrm{Fe}}_{74}{\mathrm{Mo}}_{4}{\mathrm{Ga}}_{2}{\mathrm{P}}_{10}{\mathrm{C}}_{4}{\mathrm{B}}_{4}{\mathrm{Si}}_{2}$ glassy alloys, respectively. Similarly, the $\mathrm{\ensuremath{\Delta}}{T}_{x}$ value is $33\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for the ${\mathrm{Fe}}_{77}{\mathrm{Ga}}_{3}{\mathrm{P}}_{12}{\mathrm{C}}_{4}{\mathrm{B}}_{4}$ glassy alloy, and increases to 60 and $57\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for the ${\mathrm{Fe}}_{75}{\mathrm{Mo}}_{2}{\mathrm{Ga}}_{3}{\mathrm{P}}_{10}{\mathrm{C}}_{4}{\mathrm{B}}_{4}{\mathrm{Si}}_{2}$ and ${\mathrm{Fe}}_{73}{\mathrm{Mo}}_{4}{\mathrm{Ga}}_{3}{\mathrm{P}}_{10}{\mathrm{C}}_{4}{\mathrm{B}}_{4}{\mathrm{Si}}_{2}$ glassy alloys, respectively. These four glassy alloys also exhibit rather high reduced glass transition temperature $({T}_{g}∕{T}_{l})$ of 0.58\char21{}0.60. By copper mold casting, bulk glassy alloy rods with the diameters of 1.5 to $2.5\phantom{\rule{0.3em}{0ex}}\mathrm{mm}$ were prepared. These four glassy alloys also exhibit high saturation magnetization $({I}_{s})$ of $1.11\char21{}1.32\phantom{\rule{0.3em}{0ex}}\mathrm{T}$ and good soft-magnetic properties, i.e., low coercive force $({H}_{c})$ of $2.4\char21{}3.3\phantom{\rule{0.3em}{0ex}}\mathrm{A}∕\mathrm{m}$, and high effective permeability $({\ensuremath{\mu}}_{e})$ at $1\phantom{\rule{0.3em}{0ex}}\mathrm{kHz}$ of $8500\char21{}14\phantom{\rule{0.2em}{0ex}}000$. The relation between crystallization behavior and GFA was also investigated. It was found that the primary precipitation phase of the $\mathrm{Fe}\text{\ensuremath{-}}\mathrm{Mo}\text{\ensuremath{-}}\mathrm{Ga}\text{\ensuremath{-}}\mathrm{P}\text{\ensuremath{-}}\mathrm{C}\text{\ensuremath{-}}\mathrm{B}\text{\ensuremath{-}}\mathrm{Si}$ glassy alloys is a complex fcc $(\mathrm{Fe},\mathrm{Mo}{)}_{23}(\mathrm{B},\mathrm{C}{)}_{6}$ phase, and the addition of small amounts of Si and Mo is effective for the suppression of precipitation of $(\mathrm{Fe},\mathrm{Mo}{)}_{23}(\mathrm{B},\mathrm{C}{)}_{6}$ phase, resulting in the extension of $\mathrm{\ensuremath{\Delta}}{T}_{x}$ and the improvement of GFA.