Fabrication and Properties of W-Cu Functionally Graded Material by Tape-Casting

2014 ◽  
Vol 616 ◽  
pp. 66-71
Author(s):  
Qiang Guo Luo ◽  
Yang Dai ◽  
Shu Long Liu ◽  
Kan Yu ◽  
Qiang Shen ◽  
...  
Keyword(s):  
Functionally Graded Material ◽  
Tape Casting ◽  
Copper Surface ◽  
Functionally Graded ◽  
Homogeneous Material ◽  
Equivalent Thermal Conductivity ◽  
Casting Technique ◽  
Cu Content ◽  
Graded Material ◽  
High Tungsten Content

In this paper, the W-Cu functionally graded material (FGM) was prepared by using the non-aqueous tape-casting technique combined with vacuum hot-pressing sintering. The graded composite material with high density, uniform transition and graded component was designed by 7 layers with the copper content range from 40 to 100 wt. %. Then the structures and properties of the composite were characterized. The scanning acoustic microscope (SAM) results for the W-Cu graded material showed that the interface between different layers was of high smoothness and parallel. The SEM-EDS results of cross section show that the W and Cu content changed gradually along the laminating direction after sintering. The equivalent electrical conductivity and the equivalent thermal conductivity of the W-Cu graded material were 0.3976×108 S/m and 323.5 W/(m·K), respectively, which were much higher than that of the W-40 wt. % Cu homogeneous composite. The Vickers hardness of the high tungsten content surface and the high copper surface were 163 HV and 80 HV, respectively, which were same with that of the homogeneous material.

Design and anti-penetration performance of TiB/Ti system functionally graded material armor fabricated by SPS combined with tape casting

2020 ◽  
Vol 46 (18) ◽  
pp. 28244-28249 ◽  
Author(s):  
Zhaoxin Zhong ◽  
Biao Zhang ◽  
Yicheng Jin ◽  
Haoqian Zhang ◽  
Yang Wang ◽  
...  
Keyword(s):  
Functionally Graded Material ◽  
Tape Casting ◽  
Functionally Graded ◽  
Graded Material

Fabrication and Properties of Al/Al-Cu Functionally Graded Material

2011 ◽  
Vol 675-677 ◽  
pp. 575-578 ◽  
Author(s):  
Qian Cong ◽  
Fu Min Xu ◽  
Jia Yan Li ◽  
Yi Tan ◽  
Xiao Lei Shi ◽  
...  
Keyword(s):  
Functionally Graded Material ◽  
Vickers Hardness ◽  
Functionally Graded ◽  
Precipitation Method ◽  
Continuous Change ◽  
Dense Structure ◽  
Graded Materials ◽  
Cu Content ◽  
The Matrix ◽  
Graded Material

Five-layered Al/Al-Cu functionally graded material (FGM) was fabricated by powder metallurgy technology. The microstructure and composition of the prepared specimen were studied. Vickers hardness, flexural strength and fracture surface morphology were also measured. The results showed that Al/Al-Cu graded material with dense structure and compositional continuous change was obtained by solution-precipitation method. The graded materials presented a compositional continuous change along the graded direction because of the diffusion effect, and the Vickers hardness was liner proportional to the distribution of Cu content. Compared with pure sintered Al, remarkable improvement on hardness and fracture strength was achieved due to the CuAl2 phase dispersively distributed in the matrix. With the increase of Cu content, the fracture mode changed from tough fracture to the tendency of brittle fracture.

Load Detection of Functionally Graded Material Based on Coherent Gradient Sensing Method

2016 ◽  
Vol 34 (3) ◽  
pp. 299-310
Author(s):  
J. Zhang ◽  
W. Xu ◽  
X. F. Yao
Keyword(s):  
Mechanical Behavior ◽  
Power Law ◽  
Functionally Graded Material ◽  
Large Scale ◽  
Functionally Graded ◽  
Experimental Result ◽  
Gradient Sensing ◽  
Coherent Gradient Sensing ◽  
Casting Technique ◽  
Graded Material

AbstractFunctionally graded material (FGM) has some particular characteristics due to the gradual variation of physical properties. The study on mechanical behavior of FGM is of great research value. In this work, a large scale FGM which filled with small glass spheres has been prepared by gravity assisted casting technique. The elastic material constants in static condition are measured. One optical experimental method, coherent gradient sensing (CGS), is introduced to study the mechanical behavior of FGM which has variation of material property in power-law. The governing equations of CGS which is used to represent the optics-mechanics relation of the singular field near the point of the outside force are derived based on the power-law asymptotic expansion. The experimental result shows this CGS method as a nondestructive methodology can be used to detect the damage in FGM with high accuracy.

The Verification of Computing J-Integral in Functionally Graded Material

2011 ◽  
Vol 268-270 ◽  
pp. 863-868 ◽  
Author(s):  
Z.C. Xuan ◽  
Y.H. Li ◽  
Q.J. Zhang ◽  
M. Guan
Keyword(s):  
Functionally Graded Material ◽  
Functionally Graded ◽  
Homogeneous Material ◽  
Quadratic Term ◽  
Verification Method ◽  
Optimal Value ◽  
Graded Material ◽  
Element Computation ◽  
The Difference ◽  
Finite Element Computation

We present a verification method for the finite element computation of the J-integrals in functionally graded material. An interval is obtained for the J-integral by an output bound procedure for the quantity of interest. The difference between homogeneous material and functionally graded material is that the parameter before the quadratic term in the error equation is a function of coordinates, not a constant in the homogeneous material. An optimal value for of the parameter is calculated for obtaining efficient bounds on the J-integral.

Material optimization of a cemented tibia tray using functionally graded material

2016 ◽  
Vol 58 (3) ◽  
pp. 260-268 ◽  
Author(s):  
Hassan S. Hedia ◽  
Saad M. Aldousari ◽  
Noha Fouda
Keyword(s):  
Functionally Graded Material ◽  
Functionally Graded ◽  
Material Optimization ◽  
Graded Material
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