table i their glass forming ability indicated by the critical diameter d c and thermal properties including t g t x u03b4t t m the melting temperature and t l the liquidus temperature are all listed in table i all the ce based amorphous metallic plastics of examples 9 to 35 can be prepared using the same method described in example 1 their compositions all come from the formula ce d al e cu f z g and ce h al i cu j ni k where z is one element selected from co fe ni hf mg mo nb sc ta ti w zn and zr their xrd results are similar to those of example 3 for the alloys of examples 9 to 19 their compositions and thermal data detected by the dsc method are listed in table i for examples 9 11 13 and 14 their elastic constants e g and k are also listed in table i for the alloys of examples 20 35 the compositions and the minimum volume fraction of the glass phase in each alloy are shown in table ii compared with the ternary alloy ce 70 al 10 cu 20 example 1 the introduction of the fourth element like z and ni in these quaternary alloys can improve its glass forming ability more or less but does not.