Amorphous alloys superior in mechanical strength, corrosion resi

Details Amorphous alloys superior in mechanical strength, corrosion resi Amorphous alloys superior in mechanical strength, corrosion resi

1990-06-22

1991-12-24

Roy, Upendra

Metal treatment

Stock

Amorphous, i.e., glassy

420416, 420590, C22C 2100

Patent

active

050749358

ABSTRACT:
The present invention provides an amorphous alloy having superior mechanical strength, corrosion resistance for formability, at a relatively low cost. The amorphous alloy is a composition represented by the general formula: Al.sub.100-x-y M.sub.x Ln.sub.y wherein M is at least one element selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, Mo, Hf, Ta and W; Ln is at least one element selected from the group consisting of Y, La, Ce, Nd, Sm, Gd, Tb, Dy, Ho and Yb or misch metal (Mm) which is a combination of rare earth elements; and x and y are, in atomic percentages: 0<x.ltoreq.55 and 30.ltoreq.y.ltoreq.90, preferably 0<x.ltoreq.40 and 35.ltoreq.y.ltoreq.80, and more preferably 5<x.ltoreq.40 and 35.ltoreq.y.ltoreq.70, with the proviso that 100-x-y.gtoreq.5 the alloy having at least 50% (by volume) of an amorphous phase.

REFERENCES:
patent: 4787943 (1988-11-01), Mahajan et al.
patent: 4911767 (1990-03-01), Masumoto et al.
patent: 4964927 (1990-10-01), Siftlet et al.

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