DETAILED DESCRIPTION OF THE INVENTION Metallic glass alloy powders are prepared according to a process involving first exposing a glassy alloy to hydrogen to produce an embrittled state and then comminuting the embrittled alloy to a powder.
A metallic glass is an alloy product of fusion which has been cooled to a rigid condition without crystallization.
Such metallic glasses in general have at least some of the following properties: high hardness and resistance to scratching, great smoothness of a glassy surface, dimensional and shape stability, mechanical stiffness, strength and ductility and a relatively high electrical resistance compared with related metals and alloys and a diffuse X-ray diffraction pattern.
Alloys suitable for use in my process include those known in the art for the preparation for metallic glasses, such as those disclosed in U.
S.
Pat.
No.
3,856,513; U.
S.
Pat.
No.
3,981,722; U.
S.
Pat.
No.
3,986,867; U.
S.
Pat.
No.
3,989,517 as well as many others.
For example, Chen and Polk in U.
S.
Pat.
No.
3,856,513 issued Dec.
24, 1974 disclose alloys of the composition M.
sub.
a Y.
sub.
b Z.
sub.
c, where M is one of the metals: iron, nickel, cobalt, chromium and vanadium; Y is one of the metalloids, phosphorus, boron and carbon; and Z is aluminum, silicon, tin, germanium, indium, antimony or beryllium with "a" equaling 60 to 90 atom percent, "b" equaling 10 to 30 atom percent and "c" equaling 0.
1 to 15 atom percent with the proviso that the sum of a, b and c equals 100 atom percent.
Preferred alloys in this range comprise those where "a" lies in the range of 75 to 80 atom percent, "b" in the range of 9 to 22 atom percent, "c" in the range of 1 to 3 atom percent.
Furthermore, they disclose alloys with the formula T.
sub.
i X.
sub.
j wherein T is a transition metal and X is one of the elements of the groups consisting of phosphorus, boron, carbon, aluminum silicon, tin, germanium, indium, beryllium and antimony and wherein "i" ranges between 70 and 87 atom percent and "j" ranges between 13 and 30 atom percent
|
Radio 
