Dispersion analysis of NiAl–TiC–Al2O3 composite powder ground in a high-energy attritorial mill

2006 ◽  
Vol 175 (1-3) ◽  
pp. 334-337 ◽  
Author(s):  
G. Dercz ◽  
L. Pająk ◽  
B. Formanek
Keyword(s):  
Composite Powder ◽  
High Energy ◽  
Dispersion Analysis ◽  
Al2o3 Composite

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

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.

Nanostructured powders based on aluminum reinforced by silicon nitride designed for spraying of multifunctional strengthened coatings

2019 ◽  
pp. 65-73
Author(s):  
T. I. Bobkova ◽  
B. V. Farmakovsky ◽  
N. A. Sokolova
Keyword(s):  
Silicon Nitride ◽  
Composite Powder ◽  
High Energy ◽  
Cold Gas Dynamic Spraying ◽  
Powder Materials ◽  
Structure And Properties ◽  
Gas Dynamic ◽  
Composition Structure ◽  
New Phase ◽  
Nanostructured Powders

The work deals with topical issues such as development of composite nanostructured powder materials. The results of creating powders based on the system “aluminum–nitride of silicon” are presented. Complex investigations of the composition, structure and properties of powder materials, as well as coatings formed on their basis by supersonic cold gas dynamic spraying, were carried out. It has been found that the high-energy treatment of a powder mixture of aluminum with nanofibers of silicon nitride provides the formation of a composite powder in which a new phase of the Si(1-х)AlхO(1-х)Nх type is formed, which additionally increases the hardness in the coatings to be sprayed.

Enhanced performance of low-carbon MgO-C refractories with nano-sized ZrO2-Al2O3 composite powder

2021 ◽  
Author(s):  
Qilong Chen ◽  
Tianbin Zhu ◽  
Yawei Li ◽  
Yong Cheng ◽  
Ning Liao ◽  
...  
Keyword(s):  
Composite Powder ◽  
Low Carbon ◽  
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.

Synthesis and formation mechanism of ZrB2–Al2O3 composite powder starting from ZrO2, Al, and BN

2016 ◽  
Vol 27 (2) ◽  
pp. 711-716 ◽  
Author(s):  
Chunlei Yan ◽  
Rongjun Liu ◽  
Changrui Zhang ◽  
Yingbin Cao ◽  
Xianhai Long
Keyword(s):  
Formation Mechanism ◽  
Composite Powder ◽  
Al2o3 Composite

Electrochemical Performance of Barium Strontium Cobalt Ferrite -Samarium Doped Ceria- Argentum for Low Temperature Solid Oxide Fuel Cell

2020 ◽  
Vol 991 ◽  
pp. 94-100
Author(s):  
Umira Asyikin Yusop ◽  
Tan Kang Huai ◽  
Hamimah Abdul Rahman ◽  
Nurul Akidah Baharuddin ◽  
Jarot Raharjo
Keyword(s):  
Particle Size ◽  
Low Temperature ◽  
Composite Powder ◽  
Cobalt Ferrite ◽  
High Energy ◽  
Solid Oxide ◽  
Electrochemical Characteristics ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Barium Strontium

A low operating temperature is one of the concerns in commercialising solid oxide fuel cells (SOFCs) as a portable power source. The aim of this research is to develop a new cathode material, barium strontium cobalt ferrite–samarium doped ceria (BSCF-SDC) added with argentum (Ag) for low-temperature SOFCs (LT-SOFCs). The composite powder was prepared through high-energy ball milling at 550 rpm for 2 h with a BSCF:SDC powder ratio of 50:50. The composite powder was calcined at 950 °C for 2 h and then mixed with Ag (1wt%, 3wt% and 5wt%) via dry milling at 150 rpm. The phase stability of the resulting samples was examined by X-ray diffractometry, and powder particle sizes were determined by using a Zeta-Sizer Nano ZS. The thermal stability of each sample was determined on the basis of thermal expansion coefficients (TECs), and electrochemical characteristics were determined through electrochemical impedance spectroscopy to investigate the performance of BSCF-SDC-Ag in LT-SOFCs (400–600 °C). Phase analysis demonstrated no impurity phases existed. Particle size analysis revealed that increment in Ag content affect the particle size of BSCF-SDCC. TEC analysis demonstrated that BSCF-SDC-Ag1% has a mismatch value of 16.39%, which is within the acceptable TEC range of 15%–20%. BSCF-SDC-Ag1% showed a maximum conductivity of 39.37Scm-1 at 600 °C.

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