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Synchrotron radiographic studies of ultrasonic melt processing of Metal Matrix Nano Composites

DOI: 10.1016/j.matlet.2015.11.022 DOI Help

Authors: Wajira Mirihanage (The University of Manchester) , Wenwu Xu (The University of Manchester) , Javier Tamayo-ariztondo (Brunel University London) , Dmitry Eskin (Brunel University) , Mirian Garcia-fernandez (Diamond Light Source) , Prakash Srirangam (University of Warwick) , Peter Lee (The University of Manchester)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Materials Letters

State: Published (Approved)
Published: February 2016
Diamond Proposal Number(s): 5001

Abstract: Fast synchrotron radiography was used to investigate ultrasonic cavitation bubble formation and their dynamics during liquid metal processing of Al-Cu metal matrix nano composites (MMNC) in comparison with conventional alloys. The experimental observations showed enhanced cavitation potential in MMNC melts, due to the presence of Al2O3 nano particles which were believed to be acting as heterogeneous nuclei for bubble formation. Quantitative image analysis demonstrates that the addition of nano particles increases melt agitation partially, while introducing higher flow velocity variations across the melt. This suggests that the presence of nano particles may substantially alter propensity for ultrasonic treatment effects during solidification processing of MMNCs.

Journal Keywords: Metal Matrix Nano Composites; Synchrotron Radiography; Ultrasonic Cavitation; Aluminium

Subject Areas: Chemistry

Instruments: I13-2-Diamond Manchester Imaging