Characterization of Indium addition on Sn-Bi-Sb Lead free Solder alloy

The aim of these work is to measure the effect of the addition of In with different atomic percent weight on structure, melting, Electrical and mechanical properties of Sn70-X at.% -Bi15 at.% -Sb15 at.%- Inx at.% rapidly solidified. X-ray diffraction analysis (XRD), differential scanning calorimetry (DSC), temperature dependence of resistivity (TDR), and mechanical resonance method are performed. It's found that electrical conductivity (σ) and thermal conductivity (K) increased gradually by increasing In at.%. Melting temperature reduced from 470.12 K for Sn70 at.%- Bi15 at.%- Sb15 at.% to 427.13 K in Sn61 at.%- Bi15 at.%- Sb15 at.%- In9 at.%. Also, elastic moduli, internal friction and thermal diffusivity measured from melt-quenched ribbons

Metallographic study of Sn-Bi-Sb-In alloy prepared by rapid solidification

Sn70-X at.% -Bi15 at.% -Sb15 at.%- Inx at.%  alloy ribbons were produced using melt-spinning technique. The surfaces were characterized with Optical Microscopy. Also, scanning electron microscopy combined with energy dispersive X-ray analysis (SEM-EDX). The results contribute to the understanding of the microstructure evolution in alloys of this type prepared by melt spinning technique. Microscopy can give information concerning a materials composition, previous treatment and properties. Particular features of interest are grain size, phases present, Chemical homogeneity, distribution of phases and, elongated structures formed by melt spinning technique

Microstructural analysis for Sn-Bi-Sb-In alloy prepared by rapid solidification

In the present study, Sn70-X at.% -Bi15 at.% -Sb15 at.%- Inx at.% alloy ( x= 0, 2, 4, 6), were prepared by melt spinning technique. Optical microscopy, scanning electron microscopy combined with energy dispersive X-ray analysis (SEM-EDX), X-ray diffraction analysis (XRD), and Vickers microhardness (Hv); were used to characterize the phase transformation and the microstructure evolution. The results contribute to the understanding of the microstructure evolution in alloys of the type prepared by melt spinning technique. This work reports on a comparative study of the rapidly solidified, in order to compare the microhardness and microstructural analysis

Orthorhombic Electron Spin Resonance Spectrum of U3+ in CaF2

An orthorhombic spectrum of U3+ in CaF2 was measured. The orthorhombic X, Y axes are found to lie in the (110) plane and the Z axis perpendicular to these axes. The X axes are at ±(19±1)° with the [11̅0] direction. There are, in general, twelve inequivalent magnetic sites. The g factors corresponding to one set of axes are gx=1.38±0.01, gy=2.85±0.02, and gz=2.94±0.01. Various models explaining this spectrum are discussed. The most likely model is that of an interstitial F- in the second-nearest neighbor position

Granulomatous lobular mastitis

AbstractGranulomatous lobular mastitis is an unusual breast benign inflammatory disorder with unknown aetiology. It is generally emerged with the clinical symptoms of breast mass, abscess, inflammation and mammary duct fistula. The diagnosis is made by histopathology with a chronic non-necrotizing granulomatous inflammation in lobules of the breast tissue as the microscopic feature. Therapy of granulomatous lobular mastitis consists of surgical, medication treatment or combination of both, but now researches suggest that observational management is an acceptable treatment