Development of Ni-Pd-P-B Bulk Metallic Glasses with High Glass-Forming Ability

抄録

A small amount of boron was added to Ni₆₀Pd₂₀P₂₀ and Ni₆₅Pd₁₅P₂₀ alloys. The alloys containing 3 at% boron showed improved thermal stability and glass-forming ability. The supercooled liquid region of as-spun ribbons was enlarged by about 10 K for both Ni₆₀Pd₂₀P₁₇B₃ and Ni₆₅Pd₁₅P₁₇B₃ alloys. The critical diameters for glass formation were increased up to 15 mm for Ni₆₀Pd₂₀P₁₇B₃ and 10 mm for Ni₆₅Pd₁₅P₁₇B₃, respectively. The reason of the minor B addition leading to the significant improvements of thermal stability and glass-forming ability was investigated.