A physically-based model for the electrical conductivity of peak aged and overaged Al-Zn-Mg-Cu (7xxx series) alloys is presented. The model includes calculations of the η and the S phase solvus (using a regular solution model), taking account of the capillary effect and η coarsening. It takes account of the conductivity of grains (incorporating dissolved alloying elements, undissolved particles...

Base\Noble (Angstrom) Pd Pt Rh Ag 3.989 4.012 3.923 Au 3.998 4.022 3.929 Cd 4.022 4.047 3.955 Co 3.875 3.899 3.794 Cr 3.915 3.927 3.807 Cu 3.881 3.907 3.804 Fe 3.898 3.925 3.812 Hg 4.044 4.073 3.979 Ir 3.923 3.953 3.849 Mn 3.930 3.940 3.817 Mo 3.953 3.982 3.868 Nb 3.979 4.008 3.901 Ni 3.868 3.889 3.789 Os 3.909 3.944 3.841 Pd 3.944 3.968 3.868 Pt 3.953 3.979 3.876 Re 3.936 3.955 3.850 Rh 3.922 ...

Laser ablation in liquid (LAL) sampling method transformed hard-to-digest materials to soluble particles, and thus allowed for smooth decomposition by acid digestion. LAL sampling is useful to generate nanoparticles from samples with less contamination. After acid digestion, trace elements in the LAL-sampled particles were analyzed by solution nebulization inductively coupled plasma mass spectr...

Analytical methods using sector field ICP-MS and ICP-AES were developed for the determination of Al, Ba, Be, Bi, Ca, Cd, Co, Cr, Cu, Fe, Hg, Li, Mg, Mn, Mo, Ni, Pb, Sb, Si, Sn, Sr, Tl, V, W, Zn and Zr in cerebrospinal fluid, urine, serum and blood. Sample treatment procedures merging high sample throughput, simplicity and low contamination risk were set up. Method performances were evaluated in...

The Ti/Zr-based metallic glasses (MGs) with various Cu contents are prepared, with nominal compositions of Ti45Zr40Si15 (Cu-free), Ti45Zr40Si10Cu5 (low-Cu), and Ti45Zr20Cu35 (high-Cu). The mechanical properties, corrosion resistance, and in-vitro biocompatibility of these MGs are investigated by means of nano-indentation, electrochemical analyses, MTS assays and inductively coupled plasma mass ...

In the present work, new possibilities of the X-ray diffraction for investigations of the 17 phase composition, size, shape and volume fraction of particles in ultrafine-grained (UFG) 18 martensitic steel and the Cu-Cr-Zr alloy have been demonstrated. For the first time, the method of 19 X-ray diffraction in the transmission mode was used to identify particles with a volume fraction of 20 less ...

Street dust samples have been collected in different areas in Hong Kong associated with various levels of traffic and pedestrian flow, and the concentrations of 23 chemical elements have been determined using energy dispersive X-ray fluorescence (EDXRF). The 23 studied elements were Na, Al, Si, Cl, Ti, Ba, V, Cr, Mn, Fe, Co, K, Ca, Ni, Cu, Zn, As, Pb, Rb, Sr, Y, Zr and Sn. A profile for average...

Data Description The simulated data consisted of daily PM2.5 samples for one year (1/1/1984 12/31/1984). Each sample was characterized by the concentrations of the following 50 chemical species: Al, NH3, Sb, As, Ba, Bi, Br, Cd, Ca, CO3, Cs, Cl, Cr, Co, Cu, EC (Elemental Carbon), Ga, In, I, Fe, La, Pb, Mg, Mn, Hg, Mo, Nd, Ni, Nb, NO3, OC (Organic Carbon), Pd, P, K, Pr, Rb, Se, Si, Ag, Na, Sr, SO...

Ten UsOs reference materials certified for impurities were used to develop the analytical procedure. A sequential wavelength dispersive X-ray spectrometer was used to perform the measurements. The measurement conditions were optimized to assure the best signal to background ratios and the minimum spectral interferences. Nineteen elements (Al, Bi, Ca, Co, Cr, Cu, Fe, Mg, Mn, MO, Na, Ni, Pb, Si, ...

The study was designed to investigate the synergic effect of Ti and Sn in active metal brazing Al2O3 ceramic copper brazed, using multicomponent Ag-Cu-Zr filler alloy. Numerous fine hexagonal-shaped rod-like ternary intermetallic (Zr, Ti)5Sn3 phase (L/D = 5.1 ± 0.8, measured microns) were found dispersed Ag-Cu matrix Ag-18Cu-6Sn-3Zr-1Ti alloy, along with CuZrSn phases. An approximate 15° reduct...