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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BOS5-0020-0010

Czasopismo

Journal of Achievements in Materials and Manufacturing Engineering

Tytuł artykułu

Microstructure stability of the PtRh alloys used for catalytic ammonia oxidation

Autorzy Rdzawski, Z. M.  Stobrawa, J. P.  Szynowski, J. 
Treść / Zawartość http://www.journalamme.org
Warianty tytułu
Języki publikacji EN
Abstrakty
EN Purpose: The aim of this work was to investigate the possibility of increasing performance of the PtRh alloys used in industrial processes of catalytic ammonia oxidation. Design/methodology/approach: In order to reach this objective, the extensive studies have been carried out, which were aimed at better understanding of the phenomena taking place on a surface and inside the wires of catalytic gauzes during the process. The electron microscopy methods (SEM, TEM, HRTEM), optical microscopy and microanalysis were used to examine the alloys under investigation. Findings: It was found that the performance and lifetime of the catalytic gauzes is closely related with structural stability of the alloys and with the stability of parameters of the ammonia oxidation process. Practical implications: The PtRh1O-based alloys modified with boron and yttrium have been developed, which are characterised by more stable structure than the classical PtRh1O alloy and enable significant reduction of the grain growth effect during the use of the gauzes. This should contribute to the improvement of the process efficiency and selectivity, and increase the lifetime of the catalytic gauzes. Originality/value: The developed alloys are new and original.
Słowa kluczowe
PL stopy metaliczne   materiały wielofunkcyjne   materiały inteligentne   właściwości mechaniczne   mikrostruktura  
EN metallic alloys   multifunctional materials   mechanical properties   microstructure  
Wydawca International OCSCO World Press
Czasopismo Journal of Achievements in Materials and Manufacturing Engineering
Rocznik 2007
Tom Vol. 24, nr 1
Strony 106--114
Opis fizyczny Bibliogr. 16 poz., fot., rys., tab.
Twórcy
autor Rdzawski, Z. M.
autor Stobrawa, J. P.
autor Szynowski, J.
  • Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18 a, 44-100 Gliwice, Poland, zbigniew.rdzawski@imn.gliwice.pl
Bibliografia
[1] L.A. Dobrzanski, Fundamentals of material science and physicall metalurgy, WNT, Warsaw, (2006) 783-809.
[2] K. Kozlowski, B. Skowronski, Chemical Industry 67/10 (1988) 466-468.
[3] J. Zabrzeski, Research papers. Wroclaw Technical University, 26, Monographs 10 (1985).
[4] Z. Rdzawski, K. Kozlowski, B. Nikiel, Metallographic investigation of catalyst gauzes used for ammonia oxidation, Precious Metals (1993) 503-511.
[5] Z. Rdzawski, K. Kozlowski, B. Nikiel. L. Ciura. Metallographic investigation on catalytic gauzes used for ammonia oxidation, Research papers Wroclaw Technical University Nr 39, Conference Nr 21 (1994) 19-28.
[6] B. Nikiel, Z. Rdzawski, L. Ciura, K. Kozłowski, New Platinum and Palladium alloys for ammonia oxidation process, Research papers Wroclaw Technical University Nr 43, Conference Nr 25 (1995) 80-92.
[7] Z. Rdzawski, B. Nikiel, Z. Smieszek, New Platinum and Palladium Alloys Used in the Processes of Catalytic Ammonia Oxidation, Precious Metals (1996) 133-146.
[8] Z. Rdzawski, J. Stobrawa, L. Ciura, K. Kozlowski. J. Opalko. Brittleness of the PtRhl0 catalyst gauzes, Research papers Wroclaw Technical University Nr 48, Conference Nr 28 (1999) 126-134.
[9] Z. Rdzawski, J. Stobrawa, Brittleness of the PtRhl0 catalyst gauzes, X Conference on Electron Microscopy of Solids, Warszawa-Serock, September 20-23 (1999) 333-337.
[10] M.A. Chapman, R.G. Faulkner, Computer modelling of grain boundary segregation, Acta Metallurgica 31 (1983) 677-689.
[11] J. Barszcz, M.Mrozowska, J. Szynowski, Developing of computer programme for simulation of micro additives segregation process to grain boundaries, IMN Report No 5573/98 , unpublished.
[12] Z.M. Rdzawski, J. Stobrawa, L. Ciura, B. Besztak, Microstructure and properties of wires from platinum alloys for the catalytic ammonia oxidation processes, Wire Journal International (2001) 208-214.
[13] Z. Rdzawski, Microstructure of the PtRh10 alloys used in high-temperature processes of catalytic ammonia oxidation, EUROMAT 2001, 10-14 June 2001.
[14] Z. Rdzawski, High-temperature structural stability of new platinum alloys for use in the glass industry, Material Engineering 5/124 (2001) 765-768.
[15] Z. Rdzawski, J. Stobrawa Microstructure and properties of the New Pt-Rh based alloys for high-temperature applications, Journal of Materials Processing Technology 153-154 (2004) 681-687.
[16] Z. Rdzawski, Microstructure and properties of Platinum Rhodium alloys dedicated for working in high temperature. Monographs. Nr 105 UWN-D. Academy of Mining and Metallurgy Cracow (2002).
Kolekcja BazTech
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