Microstructure Evolution and Properties of In Situ Micro/Nanoscale Mo2C Reinforced Copper Composite Synthesized by Hot-Pressing Consolidation of Mechanical Alloying Powders

2022 ◽  
Author(s):  
Yu Bian ◽  
Junjie Ni
Keyword(s):  
Mechanical Alloying ◽  
Microstructure Evolution ◽  
Hot Pressing ◽  
Copper Composite

Processing and Properties of Nb5Si3/Nb Laminates

1994 ◽  
Vol 350 ◽  
Author(s):  
John Short ◽  
Jan Kajuch ◽  
John J. Lewandowski
Keyword(s):  
Solid Solution ◽  
Mechanical Alloying ◽  
Hot Pressing ◽  
Reactive Sintering ◽  
Mechanically Alloyed ◽  
Pure Niobium ◽  
Commercially Pure ◽  
Heat Treated ◽  
Bend Tests

AbstractMechanical alloying(MA) and Reactive Sintering(RS) techniques were successfully used to produce Nb5Si3. Model laminates of mechanically alloyed Nb5Si3 and commercially pure niobium were prepared via vacuum hot pressing. Tensile properties for the as-received, vacuum heat treated and niobium with a solid solution of silicon were obtained at 298K and 77K. 298K bend tests were conducted in an in situ deformation stage in a SEM. 77K bend tests were also conducted. Toughness values are correlated to the ligament properties and effect of constraint.

Long-term ball milling and hot pressing of in-situ nanoscale tungsten carbides reinforced copper composite and its characterization

2019 ◽  
Vol 152 ◽  
pp. 134-140 ◽  
Author(s):  
Jian Li ◽  
Junjie Ni ◽  
Baoxu Huang ◽  
Jianxing Chen ◽  
Zelu Xu ◽  
...  
Keyword(s):  
Ball Milling ◽  
Hot Pressing ◽  
Tungsten Carbides ◽  
Copper Composite

Effect of Process Parameters on Porosity of Intermetallic NbCr2 Porous Materials

2013 ◽  
Vol 853 ◽  
pp. 164-168
Author(s):  
Xian Li Liu ◽  
Chao Fang ◽  
Xiao Wang ◽  
Hai Zhong Zheng
Keyword(s):  
Mechanical Alloying ◽  
Porous Materials ◽  
Process Parameters ◽  
Hot Pressing ◽  
Sintering Temperature ◽  
Laves Phase ◽  
Pressing Pressure

Laves phase NbCr2 intermetallics porous materials were in-situ synthesized by mechanical alloying followed by hot pressing. The influence of the process parameters of pressing pressure and sintering temperature on porosity of intermetallic NbCr2 porous materials was studied. The results show that in a certain range of pressing pressure from 135MPa to 405 MPa, with the pressure increasing, the porosity of NbCr2 intermetallics porous materials decrease. With the sintering temperature increasing from 1500°C to 1600°C, the porosity decrease.

Microstructure of mechanically alloyed and hot-pressed Al5CuZr2

1990 ◽  
Vol 48 (4) ◽  
pp. 970-971
Author(s):  
T. E. Mitchell ◽  
P. B. Desch ◽  
R. B. Schwarz
Keyword(s):  
Mechanical Alloying ◽  
Vickers Hardness ◽  
Hot Pressing ◽  
Rapid Quenching ◽  
Hardened Steel ◽  
Alloyed Powder ◽  
Ion Milling ◽  
Mechanical Grinding ◽  
Mechanically Alloyed ◽  
Steel Container

Al3Zr has the highest melting temperature (1580°C) among the tri-aluminide intermetal1ics. When prepared by casting, Al3Zr forms in the tetragonal DO23 structure but by rapid quenching or by mechanical alloying (MA) it can also be prepared in the metastable cubic L12 structure. The L12 structure can be stabilized to at least 1300°C by the addition of copper and other elements. We report a TEM study of the microstructure of bulk Al5CuZr2 prepared by hot pressing mechanically alloyed powder.MA was performed in a Spex 800 mixer using a hardened steel container and balls and adding hexane as a surfactant. Between 1.4 and 2.4 wt.% of the hexane decomposed during MA and was incorporated into the alloy. The mechanically alloyed powders were degassed in vacuum at 900°C. They were compacted in a ram press at 900°C into fully dense samples having Vickers hardness of 1025. TEM specimens were prepared by mechanical grinding followed by ion milling at 120 K. TEM was performed on a Philips CM30 at 300kV.

Sign in / Sign up

Export Citation Format

Share Document