explosive consolidation
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Author(s):  
A. Peikrishvili ◽  
T. Gegechkori ◽  
B. Godibadze ◽  
G. Mamniashvili ◽  
V. Peikrishvili


2018 ◽  
pp. 301
Author(s):  
S.V. Aydinyan ◽  
H.V. Kirakosyan ◽  
M.K. Zakaryan ◽  
L.S. Abovyan ◽  
S.L. Kharatyan ◽  
...  

Manufacturing W-Cu composite nanopowders was performed via joint reduction of CuO and WO3 oxides with various ratios (W:Cu = 2:1, 1:1, 1:3, 1:13.5) using combined Mg–C reducer. Combustion synthesis was used to synthesize homogeneous composite powders of W-Cu and hot explosive consolidation (HEC) technique was utilized to fabricate dense compacts from ultrafine structured W-Cu powders. Compact samples obtained from nanometer sized SHS powders demonstrated weak relation between the susceptibility and the applied magnetic field in comparison with the W and Cu containing micrometer grain size of metals. The density, microstructural uniformity and mechanical properties of SHS&HEC prepared samples were also evaluated. Internal friction (Q-1) and Young modulus (E) of fabricated composites studied for all samples indicated that the temperature 1000 °С is optimal for full annealing of microscopic defects of structure and internal stresses. Improved characteristics for Young modulus and internal friction were obtained for the W:Cu = 1:13.5 composite. According to microhardness measurement results, W-Cu nanopowders obtained by SHS method and compacted by HEC technology were characterized by enhanced (up to 85%) microhardness.



Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 727 ◽  
Author(s):  
Jianbin Li ◽  
Ming Lu ◽  
Yongbao Ai ◽  
Cong Tao ◽  
Yun Xiong

A Fe61Cr2Nb3Si12B22 amorphous alloy rod sample of 8.8 mm diameter has been successfully prepared through explosive consolidation. The structure and thermal stability of the as-synthesized sample have been analyzed through X-ray diffraction (XRD) and differential scanning calorimeter (DSC) analysis. The results demonstrate that the sample still retains an amorphous structure, and the glass transition temperature (Tg), the crystallization onset temperature (Tx), the supercooled liquid zone (ΔTx) (Tx − Tg) and the reduced glass transition temperatures (Trg) (Tg/Tm) are 784 K, 812 K, 28 K, and 0.556, respectively. Its microstructure has been investigated by optical microscopy (OM) and scanning electron microscopy (SEM). The average microhardness of the alumina compact is about 1069 HV.



2016 ◽  
Vol 774 ◽  
pp. 012067 ◽  
Author(s):  
A E Buzyurkin ◽  
E I Kraus ◽  
Ya L Lukyanov


Author(s):  
Mikheil Chikhradze ◽  
George Oniashvili ◽  
Nikoloz Chikhradze ◽  
Fernand D.S Marquis


ChemInform ◽  
2016 ◽  
Vol 47 (15) ◽  
pp. no-no
Author(s):  
Shuming Wang ◽  
Chongxiao Sun ◽  
Wenhao Guo ◽  
Qingzhi Yan ◽  
Zhangjian Zhou ◽  
...  


2015 ◽  
Vol 19 (sup1) ◽  
pp. S1-45-S1-49
Author(s):  
G. L. Yang ◽  
Q. Yu ◽  
D. K. Feng ◽  
P. Wang


2014 ◽  
Vol 455 (1-3) ◽  
pp. 174-179 ◽  
Author(s):  
Shuming Wang ◽  
Chongxiao Sun ◽  
Wenhao Guo ◽  
Qingzhi Yan ◽  
Zhangjian Zhou ◽  
...  




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