Application of feal intermetallic phase matrix based alloys in the turbine components of a turbocharger

This paper presents a possible application of the state-of-the-art alloys based on the FeAl intermetallic phases as materials for the manufacture of heat-proof turbine components in an automobile turbocharger. The research was aimed at determining the resistance to corrosion of Fe40Al5CrTiB alloy in a gaseous environment containing 9 % O2 + 0,2 % HCl + 0,08 % SO2 + N2. First the kinetics of corrosion processes for the considered alloy were determined at the temperatures of 900 °C, 1 000 °C and 1 100 °C, which was followed by validation under operating conditions. To do so, the tests were carried out over a distance of 20 000 km. The last stage involved examination of the surfaces after the test drive. The obtained results are the basis for further research in this field

Possibilities of platinum recovery from metal supported spent auto catalysts

The used auto catalytic converter is a valuable source of platinum group metals, so it is important to have it recycled in order to recover precious metals. World literature describes a number of pyro- or hydrometallurgical methods used for recovery of platinum from used automobile catalytic converters. However, all the methods, available in the literature, are used to recover platinum from ceramic carrier. Among automotive catalysts withdrawn from use, these with metallic carrier constitute quite a big group

Distinguishing Ewing sarcoma and osteomyelitis using FTIR spectroscopy

Abstract The differential diagnosis of Ewing sarcoma and osteomyelitis can be challenging and can lead to delays in treatment with possibly devastating results. In this retrospective, small-cohort study we demonstrate, that the Fourier Transformed Infrared (FTIR) spectra of osteomyelitis bone tissue can be differentiated from Ewing sarcoma and normal bone tissue sampled outside tumour area. Significant differences in osteomyelitis samples can be seen in lipid and protein composition. Supervised learning using a quadratic discriminant analysis classifier was able to differentiate the osteomyelitis samples with high accuracy. FTIR spectroscopy, alongside routine radiological and histopathological methods, may offer an additional tool for the differential diagnosis of osteomyelitis and ES

Statistical model analysis of local structure of quaternary sphalerite crystals

At the 2004 Ural International Winter School, we introduced the statistical strained tetrahedron model and discussed ternary tetrahedron structured crystals. The model allows one to interpret x-ray absorption fine structure (EXAFS) data and extract quantitative information on ion site occupation preferences and on the size and shape of each elemental constituent of the configuration tetrahedra. Here we extend the model to cover quaternary sphalerite crystal structures. We discuss the two topologically different quaternary sphalerite systems: the pseudo balanced A₁₋xBxYyZ₁₋y (2:2 cation:anion ratio), and the unbalanced AxBx C₁₋x₋x Z or AXyYy Z₁₋y₋y (3:1 or 1:3 cation:anion ratios) truly quaternary alloy systems. These structural differences cause preference values in pseudo quaternaries to vary with the relative contents, but to remain constant in truly quaternary compounds. We give equations to determine preference coefficient values from EXAFS or phonon spectra and to extract nearest-neighbour inter-ion distances by EXAFS spectroscopy. The procedure is illustrated and tested on CdMnSeTe, GaInAsSb, and ZnCdHgTe quaternary alloys

Basic Research Needs for Clean and Efficient Combustion of 21st Century Transportation Fuels

To identify basic research needs and opportunities underlying utilization of evolving transportation fuels, with a focus on new or emerging science challenges that have the potential for significant long-term impact on fuel efficiency and emissions

The use of Terrestrial Laser Scanner (TLS) to assess the activity of landslides, for example of Bodaki landslide (Beskid Niski Mts.)

W artykule przedstawiono zastosowanie naziemnego skaningu laserowego (TLS) do oceny wielkości zmian zachodzących w obrębie osuwiska Bodaki (Beskid Niski). Analiza porównawcza czterech cyfrowych modeli wysokościowych uzyskanych w wyniku skanowania pozwoliła na określenie z bardzo dużą dokładnością ilości materiału który został usunięty z osuwiska przez potok Bartniankę. Zastosowana technika pozwoliła także na określenie obszarów w największym stopniu przekształconych oraz tempa przemieszczania się wybranych fragmentów osuwiska.This paper presents application of Terrestrial Laser Scanning (TLS) to assess the magnitude of the changes taking place within the Bodaki landslide (Beskid Niski Mts.). The comparative analysis of four digital elevation models obtained by scanning allowed to determine with high accuracy the amount of material that was removed from landslides by the Bartnianka stream. The technique also allowed to identification the most transformed areas and the movement rate of selected parts of the landslide