Structure of composites consolidated from ball milled 7475 aluminum alloy and ZrO2 powders
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Jan Dutkiewicz
Abstract
Nanocomposites were prepared from 7475 alloy powder ball milled for 40 h with additions of 2 % Zr and 10 or 20 wt.% of ZrO2, Y2O3 stabilized powders. Two types of ZrO2 powder additions of size near 30 nm and 0.3–0.5 μm were used. Transmission electron microscopy studies confirmed the refinement of the aluminum solid solution grain size after milling, down to about 40 nm. The milled powders were consolidated using uniaxial hot pressing in vacuum at 380 °C and at a pressure of 600 MPa. The hardness of consolidated samples was higher for the 20 % ZrO2 nanocrystalline ceramic powder addition than for 20 % ZrO2 coarser powder, at 320 and 280 HV, respectively. Transmission electron microscopy studies allowed the determination of the grain size of aluminum solid solution to be near 100 nm after hot pressing and homogeneous distribution of ZrO2 particles. The fractions of monoclinic ZrO2 were similar in the milled powder and in the hot pressed samples. ZrO2 nanoparticles did not retard the grain growth, contrary to 2 % of Zr which prevented grain growth during hot pressing. The compression tests showed 1 000 MPa of ultimate compression strength of samples with ZrO2 nanoparticles, slightly higher than those with ZrO2 larger particle additions.
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© 2013, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Structure of composites consolidated from ball milled 7475 aluminum alloy and ZrO2 powders
- Isothermal section of the Al-Tb-V ternary system at 773 K
- Development of an atomic mobility database for disordered and ordered fcc phases in multicomponent Al alloys: focusing on binary systems
- Effect of additive and current density on microstructure and texture characteristics of copper electrodeposits
- Magnetic properties and microwave absorption properties of carbon fibers coated with FeCo alloy
- Effects of BN content on the structural and mechanical properties of a-SiBN ceramics
- Structural and relaxor characteristics of Ca0.18Sr0.226Ba0.594Nb2O6
- Study on the dielectric properties of CaCu3Ti4O12 ceramics using the one-dimensional Ising model
- Erosion wear performance of a surface diffusion alloyed coating on pure magnesium
- Evaluation of the quality of cladding deposited on continuous steel casting rolls
- Investigating the machinability of austempered ductile irons with dual matrix structures
- Simple preperation of CuO nanoparticles and submicron spheres via ultrasonic spray pyrolysis (USP)
- Fabrication of transparent Nd:YAG ceramic by vacuum sintering with CaF2 additive
- Synthesis and characterization of new Bi2FeNiO6 material using a citric acid assisted gel combustion technique
- Processing and characterization of up-converting Er3+ doped (Lu0.5Y0.5)2O3 nanophosphor
- People
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Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Structure of composites consolidated from ball milled 7475 aluminum alloy and ZrO2 powders
- Isothermal section of the Al-Tb-V ternary system at 773 K
- Development of an atomic mobility database for disordered and ordered fcc phases in multicomponent Al alloys: focusing on binary systems
- Effect of additive and current density on microstructure and texture characteristics of copper electrodeposits
- Magnetic properties and microwave absorption properties of carbon fibers coated with FeCo alloy
- Effects of BN content on the structural and mechanical properties of a-SiBN ceramics
- Structural and relaxor characteristics of Ca0.18Sr0.226Ba0.594Nb2O6
- Study on the dielectric properties of CaCu3Ti4O12 ceramics using the one-dimensional Ising model
- Erosion wear performance of a surface diffusion alloyed coating on pure magnesium
- Evaluation of the quality of cladding deposited on continuous steel casting rolls
- Investigating the machinability of austempered ductile irons with dual matrix structures
- Simple preperation of CuO nanoparticles and submicron spheres via ultrasonic spray pyrolysis (USP)
- Fabrication of transparent Nd:YAG ceramic by vacuum sintering with CaF2 additive
- Synthesis and characterization of new Bi2FeNiO6 material using a citric acid assisted gel combustion technique
- Processing and characterization of up-converting Er3+ doped (Lu0.5Y0.5)2O3 nanophosphor
- People
- People
- DGM News
- DGM News
