Electron microscopy studies of magnesium hydride

Tomasz Płociński 1Krzysztof J. Kurzydlowski 1Jerzy Bystrzycki 2

1. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
2. Military University of Technology (WAT), Kaliskiego 2, Warszawa 00-908, Poland

Abstract

Hydrogen driven vehicles with fuel cells offer the most environmentally friendly automotive technology. Among the known metals and alloys with potential use in hydrogen storage, magnesium is generally regarded as the most promising because of its high capacity (7.6 wt.%) and low cost. Mechanical (ball) milling has proved to be simple and very effective technique for synthesizing Mg-related materials exhibited sufficiently fast hydriding/dehydriding kinetics for technical applications.

Microstructure and morphology of Mg/MgH2 powder (or compacts) are crucial material parameters for fast sorption kinetics. However, to our knowledge, there are only a few works in the literature about microstructure and morphology of MgH2 powder after processing and cycling hydrogen loading. One of that reasons is the behavior of this hydride under the electron beam. MgH2 starts to release hydrogen as soon as the electrons interact with thin sample and decomposed to Mg. The microstructural and structural investigations were performed using scanning electron microscope (FE SEM) equipped with duo-STEM detector and transmission electron microscope (TEM). This investigations were carried out on nanocrystalline MgH2 without and with Cr2O3 nanopowder as a catalyst.

Morphological investigations of mechanical (ball) milled MgH2 powders showed a MgH2 particle size of 0.5-10 μm. The bright field STEM images of milled MgH2 exhibited a homogeneous crystallite size distribution with average crystallite size smaller than 100 nm. The brittle nano-Cr2O3 particles are embedded by the MgH2 matrix, forming a nanocomposite structure. The particle size of Cr2O3 was found to be 10-300 nm. TEM investigations showed the presence of small fraction of MgO phase not only in the surface of MgH2 particles but also within the micrometric particles. These oxide regions are formed probably by aggregation of passivated MgH2 particles during the ball milling.

 

Related papers
  1. Financing of industry relevant projects in Poland
  2. Electrospun nanocomposites from PHBV for bone tissue engineering
  3. Nanotechnologie w gospodarce województwa podlaskiego
  4. Modeling of growth kinetics of SiC single crystal in PVT process
  5. Application of micro- and nanostructured biomaterials in regenerative medicine
  6. Core-shell P(LLA-CL) based electrospun nanofibers for peripheral nerve tissue engineering
  7. Surface modification of PCL scaffold changes protein adsorption
  8. TiO2 nanotubes based composite layers for biomedical applications
  9. Modification of epoxy resin properties by adding multi wall carbon nanotubes
  10. Możliwości badawcze Laboratorium Skaningowej Mikroskopii Elektronowej na WIM PW
  11. Otwarcie konferencji
  12. Perspektywy rozwoju nanomateriałów konstrukcyjnych i funkcjonalnych
  13. Zastosowania mikroskopii AFM dla farmacji i medycyny
  14. Wykorzystanie nanotechnologii w procesie odlewania precyzyjnego
  15. Oczyszczanie i modyfikacja nanomateriałów węglowych
  16. Modyfikacje polimerów stosowanych w lotnictwie za pomocą nanorurek węglowych
  17. Luminescent polyurethane nanocomposites: processing, structure and properties
  18. Micro Sensor for cell force measurement
  19. Preliminary studies on degradation of polylactides fibers
  20. Effect of grain size on reactive diffusion between Ti-Al
  21. TEM investigations of the nanostructure, multilayer CrN/Cr coatings obtained by vacuum-arc method
  22. Bulk  nanostructured  titanium  fabricated  by  hydrostatic  extrusion
  23. Composites PLLA/MWNTs produced by twin-screw microcompounder
  24. Polyurethane-based material with calcite and aragonite for tissue engineering composite scaffolds
  25.  A  degradable and highly porous polyurethane scaffolds for bone tissue engineering
  26. Reduced activation ODS ferritic steel – recent development in high speed hot extrusion processing
  27. Investigation of the DLC and novel DLC-polymer hybrid coatings using FIB and SEM techniques
  28. A combination of microCT and FEM methods for development of a new scaffold for bone regeneration
  29. Properties of transparent elastomer nanocomposites (polyurethane/ ZrO2:Eu3+) as materials for optoelectronic application
  30. Investigation of fatique crack growth rate of Al 5484 ultrafine grained alloy after ECAP process
  31. Fire retardant polyurethane elastomers/aluminophosphorate nanocomposites for higher temperature application
  32. The influence of grain refinement on the corrosion mechanism of 7475 aluminium alloy
  33. Modelling the influence of the grain size distribution on the properties of nanometals
  34. Hybrid functional applied to the study of properties of narrow and wide band gap semiconductors
  35. Recrystallization and Grain Growth in Nano-structured Austenitic Stainless Steel under Electric Current Heating
  36. Effect of deformation and strain rate on diminishing of microstructure of aluminium alloys (AlCu4Zr0.5 and AlZn6Mg3CuZr)
  37. Grain refinement in CuCrZr by SPD processing
  38. Tailoring mechanical properties of nano-structured Eurofer 97 steel for fusion applications
  39. Microscopic and surface analytical characterization of TiO2 nanotubes produced by anodic oxidation and thermal treatment 
  40. Investigation of cells interactions with textile scaffolds for bone tissue enginnering
  41. Culture of osteoblasts on nanostructured titanium – preliminary observation
  42. Electrospun polymeric fibers for cartilage regeneration
  43. Biodegradable and bioabsorbable polymeric - ceramic composites for medical applications
  44. Modelling of plastic deformation of nano-polycrystalline materials
  45. Preliminary examinations of mechanical properties of DLC and novel DLC-polymer hybrid coatings for resurfacing hip prostheses
  46. Optimization of the polymeric scaffolds for bone tissue engineering fabricated by rapid prototyping method
  47. Bone tissue engineered product based on human bone derived cells and polyurethane scaffold
  48. Molecular statics simulation of nanoindentation on nanocrystalline copper
  49. Microstructural and mechanical characterization of zirconia based composite
  50. Influence of cycling on microstructure and hydriding/dehydriding properties of nanocrystalline magnesium hydride with nanosized niobium fluoride
  51. Novel synthesis of ternary magnesium based transition metal hydrides as potential energy storage materials
  52. Hydrogen absorption and desorption kinetics of magnesium hydride nanocomposite with nanosized metal oxides as catalysts
  53. Modeling of order-disorder phase transition in intermetallic compounds
  54. Optimization of polyurethane structure as the potential materials for bone tissue engineering applications
  55. Fabricationg polyurethane/calcium carbonate composite scaffold for bone tissue engineering
  56. Polyurethane nano-composites with luminescence properties for optics and optoelectronics applications.
  57. Tailoring mechanical properties by grain refinement and particle redistribution
  58. Stochastic Approach To The Changes In The Mechanical Properties Of Nano-Crystalline Materials Induced By Grain Growth
  59. Surface effect on atomic ordering in nano-layered L10 AB binaries: multiscale Monte Carlo Simulation
  60. Characterization of nanopowders
  61. Microstructure and mechanical properties of HE-treated titanium depending on its initial state
  62. Influence of hydrostatic extrusion parameters on the microstructure and mechanical properties of 6082 aluminium alloy
  63. The effect of grain size distribution on mechanical properties of nanometals
  64. Morphological and surface analytical characterization of chemically pretreated Ti surfaces intended for biomedical applications
  65. Microstructure and mechanical properties of 7475 aluminium alloy processed by SPD methods
  66. Investigation of aqueous surface processes and corrosion mechanisms of Al-(Cu)-Fe-Cr quasicrystaline approximant
  67. Characterization of the effects of hydrostatic extrusion on structure and surface properties of 303 austenitic stainless steel
  68. The Effect of Hydrostatic Extrusion on the Corrosion Stability of Austenitic Stainless Steels
  69. The Effect of Hydrostatic Extrusion on Resistance of 316 Austenitic Stainless Steel to Pit Nucleation
  70. Nanomaterials in dental applications
  71. Nanostructure formation in austenitic stainless steel
  72. Evaluation of crystal structure and polytypism of SiC in microwave sintered diamond-SiC composite by TEM and HR-TEM
  73. Hydrogen induced changes in 316L stainless steel microstructure
  74. Statistical model of grain growth in polycrystalline nanomaterials
  75. Repair and regeneration of osteochondral defects in the articular joints
  76. Corrosion resistance of nanostructured titanium
  77. Effect of surface treatment on the microstructure of TA6V
  78. Predicting site occupation of Fe in B2 NiAl from ab initio computations
  79. Structure and properties of polyurethane/YAG:Tb3+ nano-composites with luminescence properties
  80. Structure and thermal properties of epoxy resins nano-composites with flame retardants
  81. The influence of ZrO2 containing 10% Eu 3+ on the polyurethane hard domain structure of nano-composites with luminescence properties
  82. An influence of boehmite modification on the dispersion in the polyurethane matrix
  83. Materials hardness estimation by simulation of the indentation process
  84. Stability of second phase particles during processing by hydrostatic extrusion
  85. The influence of nano - filler on microstructure homogeneity and selected properties of dental ceramic - polymer composites
  86. Grain Boundary Migration in Nanocrystalline Iron
  87. Thermal properties of L10-TiAl from first principle calculations
  88. Structural stability of zirconia ceramic in water and acid solutions
  89. The influence of the structure of metastable τ - phase on magnetic hysteretic properties of Мn55.5Аl44С0.5 alloy
  90. Morphology and chemical characterization of Ti surfaces modified for biomedical applications
  91. Evaluation of degradation degree of dental hybrid composite used as permanent fillings
  92. Optimization of particle reinforced lead-free solders
  93. Microstructural evaluation during particles addition to lead-free solders
  94. Thermal stability of hybrid polyurethane and modified boehmite
  95. Applications of quantitative image analysis to the description of the morphology of hybrid polyurea-nitryle-urethanes
  96. Improvement of wetting and bonding of SiO2 ceramics and urea-urethane elastomer
  97. A hybrid atomistic-continuum finite element modelling of locally disordered crystalline structure
  98. The role of the weak points in the corrosion resistance of hydrostatically extruded steel porducts
  99. The size effect in strength and fracture toughness of deformation origin submicro- and nanomaterials.
  100. The influence of hydrostatic extrusion on mechanical properties and tribological characteristics of an austenitic stainless steel
  101. Fabrication and micro-structure characterization of Al2O3/Ni-P composites with interpenetrating phases
  102. Hydrostatic extrusion of intermetallic Ti-Al layers
  103. PULSE PLASMA SINTERING OF A NANOCRYSTALLINE Cu POWDER
  104. NANOCRYSTALLINE Cu-Al2O3 COMPOSITES SINTERED BY THE PULSE PLASMA TECHNIQUE
  105. Mechanical properties of aluminium processed by equal channel angular pressing
  106. Model for intermetallic phase and intermetallic compound solidification during diffusion soldering
  107. Texture Development in Model Al-Li Alloy Subjected to Severe Plastic Deformation
  108. The Influence of hydrostatic extrusion on microstructure of 6082 aluminum alloy
  109. Combination of ECAP and Hydrostatic Extrusion for ultra-fine grain (UFG) microstructure generation in 99.98% nickel.
  110. Microstructure refinement under high plastic strain rates in hydrostatic extrusion process
  111. Influence of severe plastic deformation on PLC effect in Al 5XXX alloy
  112. Mechanical properties and deformation behaviour of ultra-fine grained nickel.
  113. Formation of ultrafine gradient structure in hard magnetic alloy Fe-30%Cr-8%Co
  114. Sintering temperature effect on structure and properties of Al2O3/Ni-P composites with interpenetrating phases
  115. PLASTIC PROPERTIES OF GaN AND Al2O3 CRYSTAL: FEM-SIMULATION OF NANOINDENTATION CONFIRMED BY HIGH-RESOLUTION MICROSCOPY
  116. SEM investigations of tooth/ filling bonding
  117. Measuring the Grain Size Distribution of Pr-doped Zirconia Nanopowders obtained by Microwave Driven Hydrothermal Synthesis
  118. Nanometals for medical applications
  119. Effect of sever plastic deformation method on microstrucure and mechanical properties of Al and Cu
  120. The influence of twin bands density on microstructure of 316LVM austenitic stainless steel subjected to transverse rolling
  121. Microstructure evaluation in an Al-Li alloy processed by severe plastic deformation
  122. Polymer matrix composites with nanoparticles of TiC obtained by a sol-gel method
  123. Annealing temperature effect on residual stresses in 316L steel subjected to HPT process
  124. FINITE ELEMENT MODELLING OF THE RESIDUAL STRESSES IN THE CERAMIC-ELASTOMER COMPOSITES
  125. EFFECT OF INITIAL MICROSTRUCTURE ON MECHANICAL PROPERTIES OF THE Al-Cu-Mg-Mn ALLOY PROCESSED BY HYDROSTATIC EXTRUSION
  126. THE INFLUENCE OF HIGH-ANGLE BOUNDARIES ON THE MECHANICAL PROPERTIES OF NANO-CRYSTALLINE IRON OBTAINED BY SEVERE PLASTIC DEFORMATION
  127. Modelling the interaction of crack tip with nanostructure, which creating by deformation.
  128. SHRINKAGE OF DENTAL POLYMERIC COMPOSITES
  129. IN VIVO WEAR OF POLYETHYELNE GLENOID COMPONENTS IN TOTAL SHOULDER ARTHROPLASTY
  130. Atomic-scale Ab-initio computations of the B2-RuAl
  131. Ab-initio calculations of elastic properties Ni3Al and TiAl under pressure
  132. Modelling of the Influence of the Grain Size Distribution on the Grain Growth in Nanocrystals
  133. Ductility of Nanocrystalline Materials Processed by Severe Plastic Deformation
  134. Structural-strength aspects of glass/metallic composite based on Co-Cr-Mo implantation alloy
  135. Microstructure and mechanical properties of binary Al-Li alloys processed by ECAP
  136. Microstructure of the ceramic - polymer composites for dental applications
  137. Effect of Non-conventional Large Deformations on Microstructure and Properties of Metals
  138. Excellent Mechanical Properties of Nickel Processed by High Pressure Techniques
  139. Morphology and properties of oxide films formed on the nanocrystalline 316L austenite steel
  140. Al2O3-Fe functionally graded materials fabricated under magnetic field
  141. Professor CZOCHRALSKI - Distinguished Scientist and Inventor, Founder of the Modern Materials Science
  142. The influence of temperature and pressure on possibility of obtaining Al2O3/Ni-P nanocomposite through hot pressing process.
  143. Mechanical properties nanostructured iron obtained by different methods of Severe Plastic Deformation
  144. Strain localization in nanocrystalline iron after Severe Plastic Deformation
  145. Non-elastic behaviours of high-porosity ceramics and ceramic-polymer composites
  146. The Superplasticity of Hard Magnetic Alloy Fe-23wt.%Co-30%Cr with Submicrocrystalline Structure
  147. Microstructure of Ni-P thin layers obtained by a chemical method
  148. Hydrostatic extrusion and nanostructure formation in an aluminium alloy
  149. Schock Wave Deformation of Intermetallic Alloys
  150. Quantitative Description of Microstructure of Nano-materials
  151. The Structure and Mechanical Properties of Low Carbon Low Alloy Steel Subjected to Severe Plastic Deformation
  152. Studies of Ni-P Thin Films by Electroles Deposition Method
  153. Stereology of Nanomaterials
  154. Targeted Research Project: Metallic, Ceramic and Organic Nanomaterials: Processing - Structure - Properties - Applications
  155. Materials Research in Poland

Presentation: Poster at E-MRS Fall Meeting 2007, Symposium J, by Tomasz Płociński
See On-line Journal of E-MRS Fall Meeting 2007

Submitted: 2007-05-17 11:51
Revised:   2009-06-07 00:44