Abstract
Al2O3–TiAl and Al2O3-containing refractory Ni- and Fealloy composites have been fabricated by reactive in situ infiltration of TiO2 and metal oxide/metal compacts loaded with large-sized (> 5 lm) Al particles. When the compacts were heated to ignition temperature (∼ 900 °C) under pressure, thermal explosion with temperatures > 2000 °C took place leading to fully dense composites. These were characterized by X-ray diffraction, scanning and transmission electron microscopy, and atomic force microscopy. Fracture strengths and toughnesses of 47 vol.% Al2O3–TiAl were 650 MPa and 6.4 MPapm, of 26 vol.% Al2O3-containing Fe-based alloys were 1100 MPa and 18 MPapm, and those of 12 vol.% Al2O3-containing Ni-base alloys were 1450 MPa and 23 MPapm, respectively.
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Two authors (N. C. and N. A. T.) would like to thank the German-Israeli Foundation for partial financial support. G. A. S. thanks the German Research Foundation (DFG) for providing the atomic force microscope and nanoindenter under contract No. SFB 371 – C6.
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© 2001 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Editorial
- “No wise man ever wish to be younger”
- Aufsätze/Articles
- Entropy, Transformations and Sustainability of Industrial Life Cycles
- Positron Annihilation in Stable and Supercooled Metallic Melts
- Local Characterization of the Diffusion Process during Discontinuous Precipitation: A Review
- The Dependence of Abnormal Grain Growth on Initial Grain Size in 316 L Stainless Steel
- Diffusion-Controlled Grain Growth in Liquid-Phase Sintering of W–Cu Nanocomposites
- Evaluation of Densification Mechanisms of Liquid-Phase Sintering
- Phase Transformation of a Dual Phase Al–Fe Alloy Prepared by Mechanical Alloying
- Discrete Element Simulation of Ceramic Powder Processing
- Strain Relaxation and Internal Friction in the Range of the Glass Transition
- A Thermodynamic Model of an Amorphous Grain Boundary Phase in Liquid-Phase Sintered β-SiAlON Ceramic
- Epitaxial Growth of Metals on (100) SrTiO3: The Influence of Lattice Mismatch and Reactivity
- Microstructure and Modifications of Cu/Al2O3 Interfaces
- Structural Transformations Induced by Swift Heavy Ions in Polysiloxanes and Polycarbosilanes
- Metastable Al–Nd–Ni and Stable Al–La–Ni Phase Equilibria
- Phase Equilibria of the Al–Nd and Al–Nd–Ni Systems
- System Pr –Pd–O: Phase Diagram and Thermodynamic Properties of Ternary Oxides Using Solid-State Cells with Special Features
- Calculation of Phase Equilibria in Candidate Solder Alloys
- Thermodynamic Assessment of the Zr–O Binary System
- Delaminating Layered Oxide Composites with Wavy Interfaces
- Contemporary Materials Issues for Advanced EB-PVD Thermal Barrier Coating Systems
- Monte Carlo Simulations of Strength Distributions of Brittle Materials – Type of Distribution, Specimen and Sample Size
- On the Optimization of the Microstructure in Powder Metallurgical Ag–SnO2–In2O3 Contact Materials
- Some New Aspects of Microstructural Design of β-Si3N4 Ceramics
- Ni-Based SOFC Anodes: Microstructure and Electrochemistry
- Effect of Copper Line Geometry and Process Parameters on Interconnect Microstructure and Degradation Processes
- Thermal Stability of Nanoscale Co/Cu Multilayers
- Methods for Characterising the Precipitation of Nanometer-Sized Secondary Hardening Carbides and Related Effects in Tool Steels
- Prediction of Local Strain and Hardness in Sheet Forming
- Novel in situ-Infiltrated Al2O3-Metal Composites
- Influence of Microstructure and Impurities on Thermal Conductivity of Aluminium Nitride Ceramics
- Notifications/Mitteilungen
- Personelles/Personal
- Bücher/Books
- Tagungen/Conferences
Articles in the same Issue
- Frontmatter
- Editorial
- “No wise man ever wish to be younger”
- Aufsätze/Articles
- Entropy, Transformations and Sustainability of Industrial Life Cycles
- Positron Annihilation in Stable and Supercooled Metallic Melts
- Local Characterization of the Diffusion Process during Discontinuous Precipitation: A Review
- The Dependence of Abnormal Grain Growth on Initial Grain Size in 316 L Stainless Steel
- Diffusion-Controlled Grain Growth in Liquid-Phase Sintering of W–Cu Nanocomposites
- Evaluation of Densification Mechanisms of Liquid-Phase Sintering
- Phase Transformation of a Dual Phase Al–Fe Alloy Prepared by Mechanical Alloying
- Discrete Element Simulation of Ceramic Powder Processing
- Strain Relaxation and Internal Friction in the Range of the Glass Transition
- A Thermodynamic Model of an Amorphous Grain Boundary Phase in Liquid-Phase Sintered β-SiAlON Ceramic
- Epitaxial Growth of Metals on (100) SrTiO3: The Influence of Lattice Mismatch and Reactivity
- Microstructure and Modifications of Cu/Al2O3 Interfaces
- Structural Transformations Induced by Swift Heavy Ions in Polysiloxanes and Polycarbosilanes
- Metastable Al–Nd–Ni and Stable Al–La–Ni Phase Equilibria
- Phase Equilibria of the Al–Nd and Al–Nd–Ni Systems
- System Pr –Pd–O: Phase Diagram and Thermodynamic Properties of Ternary Oxides Using Solid-State Cells with Special Features
- Calculation of Phase Equilibria in Candidate Solder Alloys
- Thermodynamic Assessment of the Zr–O Binary System
- Delaminating Layered Oxide Composites with Wavy Interfaces
- Contemporary Materials Issues for Advanced EB-PVD Thermal Barrier Coating Systems
- Monte Carlo Simulations of Strength Distributions of Brittle Materials – Type of Distribution, Specimen and Sample Size
- On the Optimization of the Microstructure in Powder Metallurgical Ag–SnO2–In2O3 Contact Materials
- Some New Aspects of Microstructural Design of β-Si3N4 Ceramics
- Ni-Based SOFC Anodes: Microstructure and Electrochemistry
- Effect of Copper Line Geometry and Process Parameters on Interconnect Microstructure and Degradation Processes
- Thermal Stability of Nanoscale Co/Cu Multilayers
- Methods for Characterising the Precipitation of Nanometer-Sized Secondary Hardening Carbides and Related Effects in Tool Steels
- Prediction of Local Strain and Hardness in Sheet Forming
- Novel in situ-Infiltrated Al2O3-Metal Composites
- Influence of Microstructure and Impurities on Thermal Conductivity of Aluminium Nitride Ceramics
- Notifications/Mitteilungen
- Personelles/Personal
- Bücher/Books
- Tagungen/Conferences