Investigation On Preparing And Properties Of New Nickel-Based Amorphous Alloys

This paper studies the Fe48-xNixCr15Mo14C15B6Er2 (x = 10,20,30,40,48) alloy of glass-forming ability (GFA), at room temperature mechanical fault behavior and magnetic properties, and use of differential scanning calorimetry (DSC) on the Fe48Cr15Mo14C15B6Er2 bulk amorphous alloys Wenjing of the non-kinetic.In examining the GFA alloy found, add the Ni to Fe48Cr15Mo14C15B6Er2 amorphous alloy. GFA has not increased. With Ni increase found that in the amorphous GFA decreased.Study found that, add the Ni to Fe₄₈Cr₁₅Mo₁₄C₁₅B₆Er₂ amorphous alloy of the mechanical properties can not increase, and found Ni added to Fe₄₈Cr₁₅Mo₁₄C₁₅B₆Er₂ amorphous alloys with the magnetic properties be increased.Fe₄₈Cr₁₅Mo₁₄C₁₅B₆Er₂ compression fracture strength value of more than 1900 MPa, microhardness to 1380.8 Hv. FeNi₁₀Cr₁₅Mo₁₄C₁₅B₆Er₂ and intensity of the compression fracture has 926 Mpa, microhardness 1275.8 Hv, so two kinds of alloys can be as high-strength structural materials. Two kinds of samples before the stress fracture - a strain on the whole are better linear relationship, and there is no plastic deformation stage, the fault angle close to 0°, there are obvious fracture surface layers of the torn bodies or level morphology , is a typical brittle fracture. Reason may be that because of bulk amorphous samples contained traces of quenching hard phase, oxides and other impurities, when the formation of micro-casting porosity caused by the defect. Determination of the Fe₄₈Cr₁₀Mo₁₄C₁₅B₆Er₂, Fe₄₈Cr₁₅Mo₁₄C₁₅B₆Er₂ two kinds of non-magnetic properties of the alloy crystals, found that both are non-magnetic materials, Ni added to the amorphous alloy permeability rate of 0.02125 from 0.04474 into, that is, as a non-magnetic material to add to Fe₄₈Cr₁₅Mo₁₄C₁₅B₆Er₂ Ni - Crystal alloy performance has been enhanced.In this paper, use of differential scanning calorimetry (DSC) on a non-isothermal DSC experiment with Kissinger method of calculation and Ozawa 3mm in diameter, the amorphous Fe₄₈Cr₁₅Mo₁₄C₁₅B₆Er₂ the crystallization can be activated, respectively Ec=335.12kJ/mol; Ec= 310.51kJ/mol. Fe₄₈Cr₁₅Mo₁₄C₁₅B₆Er₂ through Suri(?)ach fitting that the bulk amorphous alloys Wenjing of the non-kinetic mechanism by NGG model and a model of the JMA. Both models are independent, in different stages of work. Crystallization of the early model of the JMA, and then the nuclear and nuclear-up is a complex crystallization process, Avrami n index dropped from 4.8 to 1.40, grain growth from the initial mechanism of the interface control of the three-dimensional transformation of the mode of growth for the Growth control the spread of the three-dimensional way, shape and the rate of increase lower level. Bulk amorphous alloys crystallization volume reached 21 to 34 percent, the crystallization mechanism model into NGG model, model index m close to 0.5.