| 摘要 |
A family of iron-based, phosphor-containing bulk metallic glasses having excellent processability and toughness, methods for forming such alloys, and processes for manufacturing articles therefrom are provided. The inventive iron-based alloy is based on the observation that by very tightly controlling the composition of the metalloid moiety of the Fe-based, P-containing bulk metallic glass alloys it is possible to obtain highly processable alloys with surprisingly low shear modulus and high toughness. Further, by incorporating small fractions of silicon (Si) and cobalt (Co) into the Fe—Ni—Mo—P—C—B system, alloys of 3 and 4 mm have been synthesized with high saturation magnetization and low switching losses. |
| 主权项 |
1. A ferromagnetic Fe-based metallic glass formed of an alloy comprising at least Fe, P, C and B, where Fe comprises an atomic percent of at least 60, P comprises an atomic percent of from 5 to 17.5, C comprises an atomic percent of from 3 to 6.5, and B comprises an atomic percent of from 1 to 3.5;
further comprising at least Mo and Ni, and optionally Co and Si; and wherein the concentrations of Mo and Ni vary in accordance with the concentration of Co and Si as follows:
where Si comprises an atomic percent of from 0 to 0.5 and Co comprises an atomic percent of from 0 to 6, then Mo comprises an atomic percent of from 4.5 to 5.5, and Ni comprises an atomic percent in a range as defined by the following equation:
m-k·z, where m ranges from 4 to 6, k ranges from 0.5 to 1, and z represents the atomic percent of Co, andwhere Si comprises an atomic percent of from 0.5 to 1.5 and Co comprises an atomic percent of from 0 to 6, then Mo comprises an atomic percent of from 3.5 to 4.5 and Ni comprises an atomic percent of from 2.5 to 4.5, and wherein the alloy has a critical rod diameter of at least 3 mm. |
