Influence of ignition parameters on microstructure and microhardness of Zr based alloy prepared by laser induced selfpropagating reaction synthesis

Abstract

Based on a large negative enthalpy of mixing among major components of bulk metallic glass forming alloy systems, a new technique to fabricate amorphous based composite materials using laser induced selfpropagating reaction synthesis (LSRS) was developed. The LSRS of the Zr₅₅Al₁₀Ni₅Cu₃₀ alloy shows that the products mainly consist of the amorphous, Zr₃Al₂ and Zr₂Cu phases. However, the amorphous phase content in the products is closely related to laser power and ignition time: high laser powers and short ignition times increase the content of the amorphous phase. The microhardness of the samples decreases with the increase of the content of the amorphous phase.

Keywords:

• SELF-PROPAGATING REACTION SYNTHESIS (SRS)
• LASER
• METALLIC GLASSES