Zr-based amorphous alloy and a preparing method thereof

Abstract

In one aspect, a Zr-based amorphous alloy comprises Zr, Ti, Cu, Ni, Fe, Be, and Sn. In another aspect, a Zr-based amorphous alloy comprises about 30-75 atomic percent of (Zr x Ti y Sn z ), about 10-35 atomic percent of (Cu m Ni n ), about 0.1-15 atomic percent of Fe, and about 0.1-35 atomic percent of Be. Reference numerals x, y and z are atomic fractions, and x+y+z equals to 1, wherein x is about 0.6-0.85, and z is in the range of about 0.01x-0.1x. Reference numerals m and n are atomic fractions, and m+n equals to 1, and wherein m is about 0.5-0.65. In yet another aspect, a method for preparing a Zr-based amorphous alloy comprises melting a raw material comprising Zr, Ti, Cu, Ni, Fe, Be, and Sn to form an alloy mixture; and molding the alloy mixture to form the amorphous alloy.

1 . A Zr-based amorphous alloy, comprising:
 Zr, Ti, Cu, Ni, Fe, Be, and Sn.   
   
   
       2 . The amorphous alloy according to  claim 1 , further comprising one or both of ETM and LTM, wherein ETM comprises at least one element selected from Group IIIB, Group IVB, Group VB and Group VIB of the Element Periodic Table, provided that ETM is not Zr or Ti, wherein LTM comprises at least one element selected from Group IB, Group IIB, Group VIIB, Group VIII of the Element Periodic Table, provided that LTM is not Cu, Ni or Fe. 
   
   
       3 . The amorphous alloy according to  claim 2 , which comprises about 30-75 atomic percent of (Zr x Ti y Sn z ), about 0-15 atomic percent of ETM, about 10-35 atomic percent of (Cu m Ni n ), about 0.1-15 atomic percent of Fe, about 0-15 atomic percent of LTM, and about 0.1-35 atomic percent of Be,
 wherein x, y and z are atomic fractions, and x+y+z equals to 1;   wherein x is about 0.6-0.85, and z is in the range of about 0.01x -0.1x;   wherein m and n are atomic fractions, and m+n equals to 1; and   wherein m is about 0.5-0.65.   
   
   
       4 . The amorphous alloy according to  claim 3 , which comprises about 40-60 atomic percent of (Zr x Ti y Sn z ), about 0-10 atomic percent of ETM, about 15-25 atomic percent of (Cu m Ni n ), about 0.5-5 atomic percent of Fe, about 0-10 atomic percent of LTM, and about 15-25 atomic percent of Be. 
   
   
       5 . The amorphous alloy according to  claim 2 , wherein ETM is one or two elements selected from the group consisting of Sc, Yt, La, Ce, Pr, Nd, Hf, V, Nb, Ta, Cr, Mo, and W. 
   
   
       6 . The amorphous alloy according to  claim 2 , wherein LTM is one or two elements selected from the group consisting of Mn, Tc, Re, Ru, Os, Co, Rh, Ir, Pd, Pt, Ag, Au, Zn, Cd, and Hg. 
   
   
       7 . The amorphous alloy according to  claim 2 , wherein ETM and LTM together comprises 1-3 elements. 
   
   
       8 . The amorphous alloy according to  claim 1 , the critical dimension of which is large than about 1 mm. 
   
   
       9 . A Zr-based amorphous alloy, comprising about 30-75 atomic percent of (Zr x Ti y Sn z ), about 10-35 atomic percent of (Cu m Ni n ), about 0.1-15 atomic percent of Fe, and about 0.1-35 atomic percent of Be,
 wherein x, y and z are atomic fractions, and x+y+z equals to 1,   wherein x is about 0.6-0.85, and z is in the range of about 0.01x -0.1x;   wherein m and n are atomic fractions, and m+n equals to 1; and   wherein m is about 0.5-0.65.   
   
   
       10 . A method for preparing a Zr-based amorphous alloy comprising: melting a raw material comprising Zr, Ti, Cu, Ni, Fe, Be, and Sn to form an alloy mixture; and molding the alloy mixture to form the amorphous alloy. 
   
   
       11 . The method according to  claim 10 , wherein the raw material further comprises one or both of ETM and LTM, wherein ETM comprises at least one element selected from Group IIIB, Group IVB, Group VB and Group VIB of the Element Periodic Table, provided that ETM is not Zr or Ti, wherein LTM comprises at least one element selected from Group IB, Group IIB, Group VIIB, Group VIII of the Element Periodic Table, provided that LTM is not Cu, Ni or Fe. 
   
   
       12 . The method according to  claim 11 , wherein the elements in the raw material have the following ratio:
 (Zr x Ti y Sn z ) a :ETM b :(Cu m Ni n ) c :Fe d :LTM e :Be f ,   wherein a, b, c, d, e and f are atomic percentages;   wherein a is about 30-75%, b is about 0-15%, c is about 10-35%, d is about 0.1-15%, e is about 0-15%, and f is about 0.1-35%,   wherein x, y and z are atomic fractions, and x+y+z equals to 1,   wherein x is about 0.6-0.85, and z is in the range of about 0.01x -0.1x;   wherein m and n are atomic fractions, and m+n equals to 1; and   wherein m is about 0.5-0.65.   
   
   
       13 . The method according to  claim 12 , wherein a is about 40-60%, b is about 0-10%, c is about 15-25%, d is about 0.5-5%, e is about 0-10%, and f is about 15-25%. 
   
   
       14 . The method according to  claim 11 , wherein ETM is one or two elements selected from the group consisting of Sc, Yt, La, Ce, Pr, Nd, Hf, V, Nb, Ta, Cr, Mo, and W. 
   
   
       15 . The method according to  claim 11 , wherein LTM is one or two elements selected from the group consisting of Mn, Tc, Re, Ru, Os, Co, Rh, Ir, Pd, Pt, Ag, Au, Zn, Cd, and Hg. 
   
   
       16 . The method according to  claim 11 , wherein ETM and LTM together comprises 1-3 elements. 
   
   
       17 . The method according to  claim 10 , wherein the melting step comprises:
 melting the raw material to form a molten mixture;   cooling the molten mixture to form at least one ingot; and   re-melting the at least one ingot to form the alloy mixture.   
   
   
       18 . The method according to  claim 10 , wherein the raw material is melted under a vacuum of less than about 5 Pa. 
   
   
       19 . The method according to  claim 10 , wherein the raw material is melted at a temperature of about 1,000-2,700° C. 
   
   
       20 . The method according to  claim 10 , wherein the molding is a cold molding process. 
   
   
       21 . The method according to  claim 10 , wherein the cooling speed of the cooling molding process is about 10-10 4  K/s. 
   
   
       22 . The method according to  claim 10 , wherein the molding is a process selected from a group consisting of melt-spinning, copper mold casting, suction casting, die casting, jetting molding, and water quenching. 
   
   
       23 . The method according to  claim 10 , wherein the raw material is melted in the presence of an inert gas. 
   
   
       24 . The method according to  claim 23 , wherein the inert gas is one or more gases selected from the group consisting of SF 6  and Group Zero gases.