Design of high strength Fe-(P, C)-based bulk metallic glasses with Nb addition

• Sheng-feng GUO^a, , , 
• Ye SHEN^b

Abstract

Bulk metallic glass (BMG) rods Fe₇₁Mo_5-xNb_xP₁₂C₁₀B₂ (x=1, 2, 3, 4 and 5) with diameter of 1 or 2 mm were synthesized by copper mold casting. The effects of Nb substitution for Mo on the structure, thermal and mechanical properties of Fe₇₁Mo_5-xNb_xP₁₂C₁₀B₂ alloys were studied by X-ray diffraction, differential scanning calorimetry and compressive testing. The results show that the substitution of Nb for Mo leads to a decreased glass forming ability, but with plasticity of 1.0%, the fracture strength of Fe₇₁Mo₂Nb₃P₁₂C₁₀B₂alloy increases up to 4.0 GPa. The improvement of the fracture strength is discussed in terms of the enhancement of atomic bonding nature and the favorite formation of a network-like structure due to the substitution of Nb for Mo.


http://www.sciencedirect.com/science/article/pii/S1003632611610327

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