Characterization of CuZrAl samples by electron microscopy

• Grant number: 12/21424-0
• Support Opportunities: Scholarships abroad - Research Internship - Scientific Initiation
• Start date: January 21, 2013
• End date: May 20, 2013
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Claudio Shyinti Kiminami
• Grantee: Francisco Gil Coury
• Supervisor: Michael Kaufman
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Institution abroad: Colorado School of Mines, United States
• Associated to the scholarship: 10/05856-2 - Processing and Characterization of bulk amorphous alloys from Cu-Zr-Al system, BP.IC

Abstract

Whit the results obtained until now, we have two unresolved questions: i) What is the origin and the nature of certain phases which does not show any electron diffraction pattern when evaluated by transmission electron microscopy on diffraction mode; ii) The presence of oxygen was confirmed by measurements of a LECO equipment and by the decrease in the glass forming ability, however it could not be detected neither by scanning electron microscopy (BSE and EDS) nor by transmission electron microscopy (EDS and HRTEM). Both questions do not have any reported answer in literature. Furthermore, having samples of similar compositions with minor Y addition gives us the possibility of comparing all these results. As Prof. Kaufman is renowned in electron microscopy area, the objective is study the influence of the oxygen and that the IC student learns more about electron microscopy techniques. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

COURY, F. G.; BOTTA, W. J.; BOLFARINI, C.; KIMINAMI, C. S.; KAUFMAN, M. J.. The role of yttrium and oxygen on the crystallization behavior of a Cu-Zr-Al metallic glass. Journal of Non-Crystalline Solids, v. 406, p. 79-87, DEC 15 2014. (12/21424-0, 10/05856-2)

COURY, F. G.; BOTTA, W. J.; BOLFARINI, C.; KIMINAMI, C. S.; KAUFMAN, M. J.. The effect of oxygen on the microstructural evolution in crystallized Cu-Zr-Al metallic glasses. INTERMETALLICS, v. 65, p. 51-55, OCT 2015. (10/05856-2, 12/21424-0)