Autor: Neubert, M. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: A Review of the Automation of the Czochralski Crystal Growth Process
Autorzy:: Winkler, J.
Neubert, M.
Rudolph, J.
Tematy:: 81.10.Fq
81.10.Aj
02.30.Yy; Pokaż więcej
Data publikacji:: 2013-08
Powiązania:: https://bibliotekanauki.pl/articles/1399420.pdf Link otwiera się w nowym oknie
Źródło:: Acta Physica Polonica A; 2013, 124, 2; 181-192
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Opis:: On the occasion of the centennial of the invention of the Czochralski crystal growth process by the Polish scientist Jan Czochralski, a review of selected strategies for the automatic control of this process is given. This review provides a sketch of the fundamental challenges of controlling the Czochralski process and the basic concepts of feedback control. Both early and modern approaches to the control of the Czochralski process are described. The discussion focuses on questions related to feed-forward control, feedback control, and state estimation. The presented methods rely on simple mathematical process models in contrast to the finite element model-based approaches typically used in crystal growth process design and analysis. Such mathematical models motivate both the structure and parameters of the chosen controller. A comprehensive list of references to background literature on this topic completes this survey.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The harmonization and optimization of diagnostic methods for a belt conveyor
Harmonizacja i optymalizacja metod diagnostycznych dla przenośników taśmowych
Autorzy:: Helebrant, F.
Moni, V.
Klouda, P.
Valentova, H.
Nedbal, J.
Neubert, M.
Kudelova, I.
Tematy:: diagnostyka
przenośniki taśmowe
prototypy
diagnostics
conveyor belts
prototype; Pokaż więcej
Data publikacji:: 2012
Powiązania:: https://bibliotekanauki.pl/articles/410215.pdf Link otwiera się w nowym oknie
Źródło:: Management Systems in Production Engineering; 2012, 2 (6); 39-44
2299-0461
Pojawia się w:: Management Systems in Production Engineering
Opis:: The final aim of the project MPO FR�]T11/537 called �gThe Complex Diagnostic System for the Belt Transport�h is a single part custom manufacturing and sale of complex diagnostic system for belt transportation and related services. The output of the project is a prototype of a diagnostic system on a model belt conveyor with prepared and certified diagnostic services and methods including their measurements and other supportive tools. The article will introduce the present state of the solution for the given grant project, especially in the field of suggested work on the diagnostic and supportive methods and other measurements.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Microstructure, Thermal and Mechanical Properties of Non-Isothermally Annealed Al-Sc-Zr and Al-Mn-Sc-Zr Alloys Prepared by Powder Metallurgy
Autorzy:: Vlach, M.
Stulíková, I.
Smola, B.
Císařová, H.
Piešová, J.
Daniš, S.
Gemma, R.
Tanprayoon, D.
Neubert, V.
Tematy:: 81.20.Ev
81.30.Mh; Pokaż więcej
Data publikacji:: 2012-09
Powiązania:: https://bibliotekanauki.pl/articles/1418427.pdf Link otwiera się w nowym oknie
Źródło:: Acta Physica Polonica A; 2012, 122, 3; 439-443
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Opis:: This paper reports results of a study aimed at understanding the precipitation processes occurring during the annealing of two Al-Sc-Zr-based alloys with and without Mn prepared by powder metallurgy with subsequent hot extrusion at 350°C. Samples were isochronally annealed up to ≈ 570°C. Precipitation behaviour was studied by electrical resistometry and differential scanning calorimetry. Mechanical properties were monitored by microhardness HV1 measurements. Transmission electron microscopy examinations and X-ray diffraction of specimens quenched from temperatures of significant resistivity changes helped to identify the microstructural processes responsible for these changes. Fine (sub)grain structure develops and fine coherent $Al_3Sc$ and/or $Al_3(Sc,Zr)$ particles precipitate during extrusion in both alloys. The distinct changes in resistivity (at temperatures above ≈ 330°C) of the Al-Mn-Sc-Zr alloy are mainly caused by precipitation of Mn-containing particles. The easier diffusion of Mn atoms along the (sub)grain boundaries is responsible for the precipitation of the $Al_6Mn$ and/or $Al_6(Mn,Fe)$ particles at relatively lower temperatures compared to the temperature range of precipitation of these particles in the classical mould-cast Al-Mn-Sc-Zr alloys The apparent activation energy for precipitation of the $Al_3Sc$ and $Al_6Mn$ particles in the Al-Mn-Sc-Zr alloy was determined as (106 ± 10) kJ $mol^{-1}$ and (152 ± 33) kJ $mol^{-1}$, respectively.
Dostawca treści:: Biblioteka Nauki

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