Microstructure of Surface Layers of Raiways After Heavy Exploatation

Mohammad Djahanbakhsh 3Hans-Jörg Fecht 3Witold Łojkowski 2Yuly V. Milman 1

1. Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Krzizanovsky, Kyiv 38(044), Ukraine
2. Polish Academy of Sciences, High Pressure Research Center (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland
3. Ulm University, Albert-Einstein-Allee 47, Ulm 89081, Germany

Abstract

Mechanical attrition, mechanical alloying and reduction of the average
grain size are responsible for the building of the so called WEL (White
Etching Layer) in rolling contact by railway. This is observed with X-ray
and electron diffraction methods. A change of the thermodynamic,
mechanical and chemical properties has been observed with the properties
of nanophase materials.

Related papers
  1. Hydrothermal Synthesis of ZnAl2O4 Spinel
  2. Localization of rare-earth dopants in the lattice of nanocrystalline ZrO2 - EXAFS study
  3. Advanced nanoporous yttria-stabilized zirconia ceramics for luminescent oxygen sensors
  4. Excitation transfer in zirconia nanocrystals and ceramics
  5. Eu Luminescence in zirconia nanocrystals
  6. ZnO ceramic sintering and luminescence properties
  7. Oferta zaawansowanych materiałów w perspektywie 5 - 20 lat
  8. Strategia rozwoju badań nanoproszków
  9. Error bars in powder diffraction
  10. Synthesis of doped ZnO nanopowders in microwave hydrothermal reactors
  11. Characterization of nanopowders
  12. Synthesis of Al doped ZnO nanopowders and their enhanced luminescence
  13. Synthesis of nanopowders in supercritical water in a continuous flow reactor
  14. A summary of results obtained in Working Group 002 "Synthesis and Processing of Nanopowders"
  15. Summary of activities of Working Group D30/003 "Synthesis and Processing of Nanopowders"
  16. Doped zirconia nanopowders made in microwave – pressure reactor
  17. Combining microwave and pressure techniques for hydrothermal synthesis of ZnO and ZrO2 nanopowders doped with a range of metal ions
  18. Luminescence properties of zinc oxide nanopowders doped with Al ions obtained by the hydrothermal and vapour condensation methods.
  19. Mechanical property of nano-TiO2 dispersed Al65Cu20Ti15 amorphous/nanocrystalline matrix bulk composite prepared by mechanical alloying and high pressure sintering
  20. Microwave technique applied on the hydrothermal synthesis and sintering of calcia stabilized zirconia nanoparticles
  21. Luminescence properties of cerium doped Y3Al5O12 nanopowders and nanoceramic
  22. Yttrium-Aluminum Garnet Synthesized in the Medium of Supercritical Fluids
  23. Advanced nanostructural zirconia ceramics for optical oxygen sensors
  24. Study of undoped and doped zirconia nanocrystals luminescence
  25. Materials Development and Examples of TechTransfer
  26. Doping of ZnO nanopowders with Mn, Ni and Cr In an ultrasound and microwave driver hydrothermal reaction
  27. Localization of rare-earth dopants in the lattice of nanocrystalline ZrO2 - EXAFS study
  28. Zirconia-based nanomaterials for oxygen sensor - generation, characterisation and optical properties
  29. Production of doped and non doped ceramics nanoparticles for optical applications
  30. Synthesis, sintering and properties of doped nanocrystalline powders of zirconia, zinc oxide and yttrium aluminum garnet (YAG)
  31. Characterization of nanocrystalline ZrO2 doped with Rare-Earth elements synthesized via High Pressure Hydrothermal Method
  32. Particle Size Distribution of ZrO2:Pr3+- Influences of pH, High Power Ultrasound, Surfactant and Dopant Quantity
  33. Time-Resolved Luminescence Characteristics of Doped YAG and YAP Nanopowders
  34. Cathodoluminescence of Al doped ZnO nanopowders
  35. Morphology of Al doped Zinc Oxide Obtained using Hydrothermal and Vapour Condensation Methods
  36. Luminescence and structural properties of rare-earth doped YAG nanoceramics
  37. Optimization of conditions of preparation of YAG nanopowders for sintering of translucent ceramics
  38. The influence of ZrO2 containing 10% Eu 3+ on the polyurethane hard domain structure of nano-composites with luminescence properties
  39. Growth and properties of ytterbium doped KY(WO4)2 nanocomposites
  40. Investigations on the utilization of nano zinc oxides synthesized by hydrothermal method in rubber compounds
  41. Peculiarities of mechanical behavior of nanocrystalline and noncrystalline materials
  42. Doping of ZnO nanopowders with Mn and Cr in an ultrasound and microwave driven hydrothermal reaction
  43. Investigations of phase composition and grain size distribution in Pr doped ZrO2
  44. Nasze wyniki, zdania i sposoby ich realizacji
  45. Morphology of Al doped zinc oxide obtained by the vapour condensation method
  46. The comparison of the properties of YAG obtained by coprecipitation and SCR method
  47. Synthesis of nanopowders at elevated pressure and their characterisation - summary of work of the WG-002
  48. Accuracy of XRD size measurements of nanocrystals
  49. Morphology of Al-Doped Zinc Oxide Obtained by the Vapour Condensation Methods
  50. SWOT analysis of various reactors used for synthesis of nanopwoders in our Working Group
  51. Preliminary research on zirconia based optical oxygen sensor
  52. Preparation and electrical properties of the BaTiO3 nanoceramics
  53. Current trends in the development of metallic nanomaterials: results of a study carried out within the EC project Nanoroad SME
  54. Microstructural Evolution in Mechanical Alloying and Hot Pressing of Aluminium and 316 Stainless Steel Powder Blend
  55. Time-resolved luminescence of nanostructured ZnO
  56. Prediction of degree of localisation of misfit dislocation cores in intercrystalline interfaces based on interfacial adhesion
  57. Kinetic and thermodynamic factors leading to dissolution of cementite in pearlitic steel subjected to severe plastic deformation under pressure
  58. Yttria stabilized zirconia nanocrystals luminescence
  59. Application of XRD diffraction methods for determination of grain size distribution in nanoparticles
  60. Optical investigations of RE-doped YAG nanoceramics
  61. Electrical properties of nanocrystalline ZrO2 at high-pressure
  62. High-pressure Induced Structural Decomposition of RE-doped YAG Nanoceramics
  63. Synthesis of Al-doped ZnO nanomaterials with controlled luminescence properties
  64. Role of plastic deformation in sintering powders
  65. Sintering of icosahedral quasicrystalline Al-Cu-Fe powders using high quasihydrostatic pressure
  66. Combination of ECAP and Hydrostatic Extrusion for ultra-fine grain (UFG) microstructure generation in 99.98% nickel.
  67. Phase transformations in pearlitic steels induced by severe plastic deformation.
  68. Mechanical properties and deformation behaviour of ultra-fine grained nickel.
  69. Grain Size and Grain Size Distribution of Nanocrystalline Pr-doped Zirconia Powders Obtained in High Pressure Microwave Reactor
  70. Influence of synthesis conditions on the particles size and the morphology of zinc oxide nanopowders
  71. Measuring the Grain Size Distribution of Pr-doped Zirconia Nanopowders obtained by Microwave Driven Hydrothermal Synthesis
  72. Excellent mechanical properties of UFG metals and alloys, subjected to combination of severe plastic deformation methods.
  73. An FT-IR Spectroscopic Investigation of Hydroxide Groups in Nano-Crystals of ZrO2.
  74. Development of microstructure and mechanical properties in nickel deformed by hydrostatic extrusion
  75. Structural and luminescence properties of yttrium-aluminum garnet (YAG) nanoceramics
  76. Biocompatibility of thin films based on hydrothermal synthesized HAp
  77. Hybrid HAp- maleic anhydride copolymer nanocomposites obtained by in situ functionalisation
  78. Fabrication and electrical properties of Eu3+:BaTiO3 nanoceramics for SOFC
  79. Luminescence of ZrO2 nanocrystals
  80. Molecular impurities in the luminescent ZnO nanocrystals
  81. X-Ray investigations of the natural and artificial White Etching Layer
  82. Diffusion and diffusion induced defects in GaN
  83. Excellent Mechanical Properties of Nickel Processed by High Pressure Techniques
  84. Microwave driven hydrothermal synthesis of iron oxide - the effect of process parameter on the properties of the nanopowders
  85. Relaxation processes in ZrO2 at high pressures
  86. Luminescence of ZrO2 and ZnO nanocrystals
  87. Zinc oxide nanopowders obtained by the microwave-hydrothermal route
  88. Microwave driven hydrothermal synthesis of Pr-doped zirconia nanopowders
  89. New hydroxyapatite based nanomaterials for potential use in medical fields
  90. Markets and Economical Aspects of Nano- and Microtechnology Related Products
  91. Diamond- an emerging material for medical and technical applications
  92. Correlation between high-pressure ZrO2 electrical properties and crystallite size
  93. High Performance Nanoscale Materials and Bulk Metallic Glass
  94. Precise determination of full Grain Size Distribution from diffraction peak profile as a result of kinematical theory of diffraction for polidispersive nanomaterials
  95. Pressure Effect on Grain Boundary Diffusion in Al Bicrystals
  96. Sintering of Germanium Single Crystals in Different P-T Conditions
  97. Obtaining Amorphous and Nanocrystalline Materials by Plastic Deformation and Mechanical Alloying
  98. On the Correlation of Mechanical Behaviour of Ceramic Materials Under Shock Compression and Static Intendation
  99. Normal Grain Growth in 2-d Strips of Polycrystalline Aluminium Under High Pressure
  100. Reaction Diffusion in Metallic Systems under High Pressure
  101. High Pressure Effect on Grain Boundary Wetting in Aluminium Bicrystals
  102. Pressure Effect on Interface Energy, Diffusion and Reactions
  103. Microwave-Hydrothermal Synthesis of Nanostructured Pr-Doped Zirconia Powders
  104. The Strain Induced Cementite Dissolution in Carbon Steels-Experimental Facts and Theoretical Approach
  105. Effect of SPD Grain Refinement and Peculiarity of Structure and Mechanical Properties of UFG Ni
  106. Luminescense of Nanosize ZrO2
  107. Structure, Morphology and Luminescence Properties of Pr-doped Nanocrystalline ZrO2 Obtained by Hydrothermal Method
  108. Nanostructure Formation on the Surface of Railway Tracks and Wheelsets
  109. Hydrothermal Synthesis of Zinc Oxide Nanopowders with Microwaves Applications
  110. Microwave Driven Hydrothermal Synthesis of Iron Oxide Nanopowders
  111. Indentation Technique for Determination if Mechanical Behavior of Nanomaterials (Bulk and Coatings)

Presentation: poster at High Pressure School 1999 (3rd), by Mohammad Djahanbakhsh
See On-line Journal of High Pressure School 1999 (3rd)

Submitted: 2003-02-16 17:33
Revised:   2003-10-21 01:42
Google
 
Web science24.com
© 1998-2008 pielaszek research, all rights reserved Powered by the Conference Engine