Patent ID: 7998286
Filing Date: 2011-08-16
Classification: C22C

Abstract:
1. A bulk metallic glass having a high corrosion resistance comprising a composition including at least Zr, Ti, Be and an additive X wherein X is an additive material selected from the group consisting of Y, Co, Fe, Cr, Mo, Mg, Al, Hf, Ta, Nb and V; wherein in the composition the sum of Zr and Ti is at least around 60 at %; wherein in the composition the sum of Be and X is from around 25 to 40 at %, wherein Be is at least around 25 at %, and X is at least around 2 at %; wherein elements having an electronegativity of at least 1.9 are present only in trace amounts; and wherein the bulk metallic glass demonstrates a lower corrosion rate than conventional ZrTiBe amorphous alloys having at least 2.5 at % Cu or Ni in a test wherein a plurality of tested samples having an identical starting shape and volume are immersed in a 37% HCl solution for 72 hours.