scholarly journals Open‐Cell Aluminum Foams by the Sponge Replication Technique: A Starting Powder Particle Study

2020 ◽  
Vol 22 (5) ◽  
pp. 1901194 ◽  
Author(s):  
Alina Sutygina ◽  
Ulf Betke ◽  
Michael Scheffler
Keyword(s):  
Powder Particle ◽  
Aluminum Foams ◽  
Open Cell ◽  
Replication Technique

scholarly journals Open-Cell Aluminum Foams by the Sponge Replication Technique

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3840 ◽  
Author(s):  
Sutygina ◽  
Betke ◽  
Scheffler
Keyword(s):  
Thermal Conductivity ◽  
Aluminum Oxide ◽  
Thermal Processing ◽  
Total Porosity ◽  
Lower Amount ◽  
Processing Conditions ◽  
Aluminum Foams ◽  
Open Cell ◽  
Thermally Processed ◽  
Replication Technique

Open-cell aluminum foams were manufactured by a sponge replication technique having a total porosity of ~90%. The influence of the thermal processing conditions such as atmosphere and temperature on the cellular structure, phase composition porosity, thermal conductivity, and compressive strength of the foams was studied. It was found that the thermal processing of aluminum foams in Ar at temperatures up to 800 °C led to aluminum foams with a reduced strut porosity, a lower amount of aluminum oxide, a higher thermal conductivity, and a higher compression strength, compared to foams thermally processed in air. These results were explained by the lower amount of aluminum oxide after thermal processing of the foams.

A novel method for making open cell aluminum foams by powder sintering process

2005 ◽  
Vol 59 (26) ◽  
pp. 3333-3336 ◽  
Author(s):  
B. Jiang ◽  
N.Q. Zhao ◽  
C.S. Shi ◽  
X.W. Du ◽  
J.J Li ◽  
...  
Keyword(s):  
Sintering Process ◽  
Aluminum Foams ◽  
Open Cell ◽  
Powder Sintering ◽  
Novel Method

The Effects of Compression and Pore Size Variations on the Liquid Flow Characteristics in Metal Foams

2001 ◽  
Vol 124 (1) ◽  
pp. 263-272 ◽  
Author(s):  
K. Boomsma ◽  
D. Poulikakos
Keyword(s):  
Flow Characteristics ◽  
Maximum Flow ◽  
Metal Foams ◽  
Heat Sinks ◽  
Convection Heat ◽  
Hydraulic Characteristics ◽  
Aluminum Foams ◽  
Transitional Regime ◽  
Open Cell ◽  
Flow Velocities

Open-cell aluminum foams were investigated using water to determine their hydraulic characteristics. Maximum fluid flow velocities achieved were 1.042 m/s. The permeability and form coefficient varied from 2.46×10−10 m2 and 8701 m−1 to 3529×10−10 m2 and 120 m−1, respectively. It was determined that the flowrate range influenced these calculated parameters, especially in the transitional regime where the permeability based Reynolds number varied between unity and 26.5. Beyond the transition regime where ReK≳30, the permeability and form coefficient monotonically approached values which were reported as being calculated at the maximum flow velocities attained. The results obtained in this study are relevant to engineering applications employing metal foams ranging from convection heat sinks to filters and flow straightening devices.

Effect of Heat Treatment on Compressive Properties of Open Cell Aluminum Foams

2007 ◽  
pp. 1417-1420
Author(s):  
Chen Li ◽  
Zhi Hua Wang ◽  
Hong Wei Ma ◽  
Long Mao Zhao ◽  
Gui Tong Yang
Keyword(s):  
Heat Treatment ◽  
Compressive Properties ◽  
Aluminum Foams ◽  
Open Cell

Compressive Properties of Open Cell Aluminum Foams

2005 ◽  
Vol 486-487 ◽  
pp. 472-475 ◽  
Author(s):  
Bo Young Hur ◽  
Bu Keoun Park ◽  
Sang Youl Kim ◽  
Hoon Bae
Keyword(s):  
Aluminum Alloy ◽  
Strain Curve ◽  
Elastic Response ◽  
Aluminum Foams ◽  
Plateau Region ◽  
Lower Yield Stress ◽  
Open Cell ◽  
Linear Elastic ◽  
Open Cell Foam ◽  
Uniaxial Compressive Test

The uniaxial compressive test results of several aluminum foams are compared with aluminum alloy and ppi (pore per inch) of open cell foam. The compressive stress-strain curve of aluminum alloy foams exhibits universal three deformation regions: an initial linear elastic response, and then extended plateau region with a nearly constant flow stress, a final densification as collapsed cells are compacted together. The lower the foam densities are, the longer the plateau region is, but lower densities also imply lower yield stress.

scholarly journals Manufacturing of Open-Cell Metal Foams by the Sponge Replication Technique

2020 ◽  
Vol 882 ◽  
pp. 012022
Author(s):  
A Sutygina ◽  
U Betke ◽  
G Hasemann ◽  
M Scheffler
Keyword(s):  
Metal Foams ◽  
Open Cell ◽  
Replication Technique

Compressive properties of two-layered aluminum foams with closed-cell and open-cell structures

2020 ◽  
Vol 24 ◽  
pp. 101249
Author(s):  
Yoshihiko Hangai ◽  
Mizuki Ando ◽  
Masataka Ohashi ◽  
Kenji Amagai ◽  
Ryosuke Suzuki ◽  
...  
Keyword(s):  
Compressive Properties ◽  
Aluminum Foams ◽  
Open Cell ◽  
Cell Structures ◽  
Closed Cell

Fatigue of As-Fabricated Open Cell Aluminum Foams

2005 ◽  
Vol 127 (1) ◽  
pp. 40-45 ◽  
Author(s):  
J. Zhou ◽  
Z. Gao ◽  
A. M. Cuitino ◽  
W. O. Soboyejo
Keyword(s):  
Shear Bands ◽  
Digital Camera ◽  
Image Correlation ◽  
Ex Situ ◽  
Aluminum Foams ◽  
Open Cell ◽  
Strain Jump ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis

This paper presents the results of the combined experimental investigation and digital image correlation (DIC) analysis of the fatigue failure of open cell aluminum foams. Compression–compression cyclic loads were applied to foam specimens under the as-fabricated condition. Following characterization of the S-N curve behavior, the macroscale deformation of the tested foam under fatigue was recorded using an in-situ digital camera. The deformation sequence was then analyzed using DIC technique. It was found that foams failed with an abrupt strain jump when shear bands were formed, and serious deformation up to more than 30% was developed in the center of the shear band. The ex-situ scanning electron microscopy analysis indicated that the abrupt strain jump was due to the microscale damage accumulation in struts where surface cracks were formed and propagated.

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