Production of Al–20 wt.% Al2O3 composite powder using high energy milling

2009 ◽  
Vol 192 (3) ◽  
pp. 346-351 ◽  
Author(s):  
S.S. Razavi Tousi ◽  
R. Yazdani Rad ◽  
E. Salahi ◽  
I. Mobasherpour ◽  
M. Razavi
Keyword(s):  
Composite Powder ◽  
High Energy ◽  
High Energy Milling ◽  
Al2o3 Composite

scholarly journals Fabrication of Ti3AlC2/Al2O3 nanocomposite by a novel method

2011 ◽  
Vol 43 (3) ◽  
pp. 289-294 ◽  
Author(s):  
J. Zhu ◽  
L. Ye ◽  
F. Wang
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Hot Pressing ◽  
Reaction Path ◽  
Raw Materials ◽  
High Energy ◽  
Good Combination ◽  
High Energy Milling ◽  
Al2o3 Composite ◽  
Novel Method

A Ti3AlC2/Al2O3 nanocomposite was synthesized using Ti, Al, C and TiO2 as raw materials by a novel combination of high-energy milling and hot pressing. The reaction path of the 3Ti-8C-16Al-9TiO2 mixture of powders was investigated, and the results show that the transitional phases TiC, TixAly and Al2O3 are formed in high-energy milling first, and then TixAly is transformed to the TiAl phase during the hot pressing. Finally, a reaction between TiC and TiAl occurs to produce Ti3AlC2 and the nanosized Ti3AlC2/Al2O3 composite is synthesized. The Ti3AlC2/Al2O3 composite possessed a good combination of mechanical properties with a hardness of 6.0 GPa, a flexural strength of 600 MPa, and a fracture toughness (K1C) of 5.8 MPa?m1/2. The strengthening and toughening mechanisms were also discussed.

scholarly journals Characteristics of Cu-Al2O3 composites of various starting particle size obtained by high-energy milling

2009 ◽  
Vol 74 (5) ◽  
pp. 595-605 ◽  
Author(s):  
Viseslava Rajkovic ◽  
Dusan Bozic ◽  
Milan Jovanovic
Keyword(s):  
Particle Size ◽  
Internal Oxidation ◽  
Lattice Distortion ◽  
Copper Matrix ◽  
High Energy ◽  
Lattice Parameter ◽  
Constant Amount ◽  
High Energy Milling ◽  
Al2o3 Composite ◽  
Powder Particles

The powder Cu-Al2O3 composites were produced by high-energy milling. Various combinations of particle size and mixtures and approximately constant amount of Al2O3 were used as the starting materials. These powders were separately milled in air for up to 20 h in a planetary ball mill. The copper matrix was reinforced by internal oxidation and mechanical alloying. During the milling, internal oxidation of pre-alloyed Cu-2 mass %-Al powder generated 3.7 mass % Al2O3 nano-sized particles finely dispersed in the copper matrix. The effect of different size of the starting copper and Al2O3 powder particles on the lattice parameter, lattice distortion and grain size, as well as on the size, morphology and microstructure of the Cu-Al2O3 composite powder particles was studied.

Mechanical Behaviour of Ultrafine Grained Cu and Cu-(2.5 and 5) Vol.%Al2O3 Composites Produced by Powder Compact Forging

2011 ◽  
Vol 275 ◽  
pp. 170-173
Author(s):  
Aamir Mukhtar ◽  
De Liang Zhang
Keyword(s):  
Composite Powder ◽  
Powder Compact ◽  
High Energy ◽  
High Yield ◽  
High Yield Strength ◽  
High Fracture ◽  
Composite Powders ◽  
Al2o3 Composite ◽  
Ultrafine Grained ◽  
Powder Compacts

Nanostructured Cu-(2.5 and 5)vol.%Al2O3 composite powders were produced from a mixture of Cu powder and Al2O3 nanopowder using high energy mechanical milling, and then compacted by hot pressing. The Cu and Cu-Al2O3 composite powder compacts were then forged into disks at temperatures in the range of 500-800°C to consolidate the Cu and Cu-Al2O3 composite powders. Tensile testing of the specimens cut from the forged disks showed that the Cu forged disk had a good ductility (plastic strain to fracture: ~15%) and high yield strength of 320 MPa, and the Cu-(2.5 and 5)vol.%Al2O3 composite forged disks had a high fracture strength in range of 530-600 MPa, but low ductility.

Impurity Tracing in Nanostructured Al and Al/Al2O3 Composite Prepared by High Energy Milling

2010 ◽  
Vol 19 (4) ◽  
pp. 393-402 ◽  
Author(s):  
S. S.Razavi Tousi ◽  
R.Yazdani Rad ◽  
M. S. Abdi
Keyword(s):  
High Energy ◽  
High Energy Milling ◽  
Al2o3 Composite

Effect of high energy milling and compaction pressure on density of a sintered Nb–20%Cu composite powder

2015 ◽  
Vol 51 ◽  
pp. 207-211 ◽  
Author(s):  
Franciné Alves da Costa ◽  
Gilberto Melchiors ◽  
Uílame Umbelino Gomes ◽  
Angelus Giuseppe Pereira da Silva
Keyword(s):  
Composite Powder ◽  
Compaction Pressure ◽  
High Energy ◽  
High Energy Milling

Sintering under plasma of a Ta–20%Cu composite powder prepared by high energy milling

2008 ◽  
Vol 26 (3) ◽  
pp. 207-211 ◽  
Author(s):  
F.A. da Costa ◽  
J.F. da Silva ◽  
A.G.P. da Silva ◽  
U.U. Gomes ◽  
C. Alves
Keyword(s):  
Composite Powder ◽  
High Energy ◽  
High Energy Milling

Effect of Milling Time on Microstructure of CNTs/Al5083 Composites Powder by High Energy Milling

2014 ◽  
Vol 788 ◽  
pp. 608-612
Author(s):  
Zheng Li ◽  
Xiao Lan Cai ◽  
Feng Yi ◽  
Ming Jun Yu ◽  
Chui Hu
Keyword(s):  
Particle Size ◽  
Crystallite Size ◽  
Composite Powder ◽  
Milling Time ◽  
Average Crystallite Size ◽  
High Energy ◽  
High Energy Milling ◽  
Medium Particle ◽  
Medium Particle Size ◽  
Time Lead

The 2wt%CNTs/Al5083 composite powder was prepared by High Energy Milling, and the effect of the milling time on microstructure of the 2wt.%CNTs/Al5083 composite powder was investigated. The Microstructure was observed by SEM, TEM and XRD. The result showed that prolonging the milling time lead to the reduction of the Medium particle size D50. The best D50 was obtained at milling 2.5h with the particle size of 22.33μm. CNTs homogeneous embedded into the Al-matrix when the milling time was 2.5h. The average crystallite size of Al was 46.4nm after milling for 2.5h, and the average crystallite size of Al also increased as the recrystallization.

scholarly journals Fabrication of Fe-TiC Composite Powder by High-Energy Milling and Subsequent Reaction Synthesis

2013 ◽  
Vol 20 (1) ◽  
pp. 53-59 ◽  
Author(s):  
Ki-Bong Ahn ◽  
Byung-Hun Lee ◽  
Young-Hee Lee ◽  
Hyunh Xuan Khoa ◽  
Ji-Soon Kim
Keyword(s):  
Composite Powder ◽  
High Energy ◽  
Reaction Synthesis ◽  
Subsequent Reaction ◽  
High Energy Milling
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