The aim of this study is to extract brownmillerite from sulfate resisting Portland cement (SRPC) in order determine its crystal chemistry and the effects dissolution protocols. Brownmillerites (C4AF) four SRPC were extracted systematically studied by X-ray diffraction (XRD), electron probe microanalysis (EPMA), fluorescence spectroscopy. Two extraction steps used. first salicylic acid/methanol ...

The homogeneous bulk assumption used in traditional electron probe microanalysis (EPMA) can be applied for thin-layered systems with individual layers as thick as 50 nm provided the penetration depth of the lowest accelerating voltage exceeds the total film thickness. Analysis of an NIST Ni-Cr thin film standard on Si using the homogeneous model yielded certified compositions and application of...

Phase equilibria in the Ti-Nb-Mn ternary system at 1173K, 1273K and 1373K were studied through equilibrated alloy method by using scanning electron microscopy (SEM), probe microanalysis (EPMA) X-ray diffraction (XRD) techniques. A new stable phase K was confirmed composition around Ti50Nb7Mn43. wide-range continuous solid solution (Ti,Nb)Mn2 with C14 Laves structure had been found these tempera...

To reduce microsegregation, a series of homogenization treatments were carried out on Ni–Co based superalloy prepared through directional solidification (DS). The element segregation characteristics and microstructural evolution investigated by optical microscopy (OM), scanning electron (SEM), probe microanalysis (EPMA). results show that the elements are non-uniformly distributed in solidified...

This article summarizes the basic principles of electron probe microanalysis, with examples of applications in materials science and geology that illustrate the capabilities of the technique. Handbook of instrumental techniques from CCiTUB Electron probe microanalysis

This work focused on the effects of laser energy density relative density, microstructure, and microhardness Inconel 718 alloy manufactured by selective melting (SLM). The microstructural architectures, element segregation behavior in interdendritic region evolution laves phases as-SLMed IN718 samples were analyzed optical metallography (OM), scanning electron microscopy (SEM), dispersive spect...

Purpose: Highly crystalline thin hydroxyapatite (HA) layers deposited on the surface of commercially pure titanium (cpTi) by discharge anodic oxidation and hydrothermal treatment (SA treatment) enhance the value of cpTi as endosseous implants in clinical dentistry. In particular, the SA treatment affects the osteoconductive properties of cpTi. Determining whether this HA layer retains its chemi...

Componential analysis of extractives is important for better understanding the structure and utilization of biomass. In this investigation, wheat straw (WS) was extracted with petroleum ether (PE) and carbon disulfide (CS2) sequentially, to afford extractable fractions EFPE and EFCS2, respectively. Detailed componential analyses of EFPE and EFCS2 were carried out with Fourier transform infrared...

This in vitro study aimed to investigate the efficacy of tannin-fluoride and milk-fluoride mixtures on human enamel erosion after exposure to inappropriately chlorinated pool water. Enamel specimens were immersed in swimming pool water (pH 2.7) for 30 min and in each test reagent for 4 min once a day for 60 consecutive days (group I: control, group II: tannin-fluoride, group III: milk-fluoride,...