MECHANICAL SPECTROSCOPY OF MgB2 CONTAINING SiC

Author(s)

Silva, M. R. ^[1] ; Silva, L. B. S. ^[2] ; Rodrigues Junior, D. ^[2] ; Grandini, C. R. ^[1]

Affiliation

^[1] UNESP Univ Estadual Paulista, Lab Anelasticidade & Biomat, BR-17033360 Bauru, SP - Brazil

^[2] Univ Sao Paulo, Lab Mat Especiais, BR-12602810 Lorena, SP - Brazil

• Document type: Journal article
• Source: ARCHIVES OF METALLURGY AND MATERIALS; v. 60, n. 4, p. 3083-3086, 2015.
• Web of Science Citations: 2

Abstract

The compound magnesium diboride (MgB2) has been well-known since the 1950s; however, its superconducting properties were unknown. Intrinsic characteristics of MgB2 make this material a promising candidate for technological applications, although the low value of the irreversibility field and the decrease in critical current density with the increase in the magnetic field considerably reduce its utility. The present work aimed to study the effect of carbon-based doping on anelastic properties of MgB2 as measured by mechanical spectroscopy. The samples were prepared by using the powder-in-tube method. The samples were made with 5, 7.5, and 10 wt.% of silicon carbide (SiC). The results reveal complex mechanical loss spectra caused by the interaction between point defects and surface defects in the crystalline lattice of MgB2. (AU)

• FAPESP's process: 09/08811-2 - Effect of carbon-based dopants in the anelastic properties of MgB2
• Grantee: Marcos Ribeiro da Silva
• Support Opportunities: Scholarships in Brazil - Doctorate