In situ investigations on the oxidation of the ordered intermetallic compound Co0.6Ga0.4

2000 ◽  
Vol 136-137 (1-2) ◽  
pp. 971-977 ◽  
Author(s):  
U Koops
Keyword(s):  
Intermetallic Compound ◽  
Ordered Intermetallic

Dislocation Substructures Produced During Tensile, Creep, and Fatigue Deformation of Ti3Al at 700°C

1977 ◽  
Vol 35 ◽  
pp. 272-273
Author(s):  
S. M. L. Sastry
Keyword(s):  
Intermetallic Compound ◽  
Strain Rate ◽  
Tensile Creep ◽  
Slip Systems ◽  
Slip Vector ◽  
Superlattice Structure ◽  
Slip Activity ◽  
Dislocation Arrangement ◽  
Ordered Intermetallic ◽  
Tangled Dislocation

Ti3Al is an ordered intermetallic compound having the DO19-type superlattice structure. The compound exhibits very limited ductility in tension below 700°C because of a pronounced planarity of slip and the absence of a sufficient number of independent slip systems. Significant differences in slip behavior in the compound as a result of differences in strain rate and mode of deformation are reported here.Figure 1 is a comparison of dislocation substructures in polycrystalline Ti3Al specimens deformed in tension, creep, and fatigue. Slip activity on both the basal and prism planes is observed for each mode of deformation. The dominant slip vector in unidirectional deformation is the a-type (b) = <1120>) (Fig. la). The dislocations are straight, occur for the most part in a screw orientation, and are arranged in planar bands. In contrast, the dislocation distribution in specimens crept at 700°C (Fig. lb) is characterized by a much reduced planarity of slip, a tangled dislocation arrangement instead of planar bands, and an increased incidence of nonbasal slip vectors.

In-situ STEM and Spectroscopic Imaging of Ordered Intermetallic Fuel Cell Nanocatalysts

2012 ◽  
Vol 18 (S2) ◽  
pp. 1306-1307
Author(s):  
Y. Yu ◽  
H.D. Abruña ◽  
H.L. Xin ◽  
D.A. Muller ◽  
D. Wang
Keyword(s):  
Fuel Cell ◽  
Spectroscopic Imaging ◽  
Ordered Intermetallic

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.

Anelastic relaxation behavior of hydrogen in L12 ordered intermetallic compound Ni3Al

2002 ◽  
Vol 47 (9) ◽  
pp. 625-629 ◽  
Author(s):  
C.B. Jiang ◽  
H. Li ◽  
C.X. Huang ◽  
G.Y. Li ◽  
S.D. Wu ◽  
...  
Keyword(s):  
Intermetallic Compound ◽  
Relaxation Behavior ◽  
Ordered Intermetallic

In situ X-ray diffraction study of the phase transformation in the non-stoichiometric intermetallic compound Ti3Sn

2014 ◽  
Vol 582 ◽  
pp. 360-363 ◽  
Author(s):  
Olga Ivanova ◽  
Myroslav Karpets ◽  
Alain R. Yavari ◽  
Konstantinos Georgarakis ◽  
Yuriy Podrezov
Keyword(s):  
Phase Transformation ◽  
Intermetallic Compound ◽  
Diffraction Study ◽  
X Ray Diffraction ◽  
X Ray

Microstructure of In Situ Al3Ti0.4Zr0.6p/Al Fabricated with Electromagnetic Field

2011 ◽  
Vol 284-286 ◽  
pp. 2280-2283 ◽  
Author(s):  
Gui Rong Li ◽  
Xun Yin Zhang ◽  
Yi Nan Zhao ◽  
Fei Yuan ◽  
Ting Wang Zhang ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Intermetallic Compound ◽  
Uniform Distribution ◽  
Raw Materials ◽  
Aluminum Matrix ◽  
Atomic Ratio ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Average Size

The K2TiF6,K2ZrF6powder and aluminum were selected as the raw materials to in situ synthesize the particulates reinforced aluminum matrix composites. During the fabrication process the electromagnetic field was imposed. The atomic ratio of Al/Ti/Zr in the particulates is determined as 3/0.4/0.6. The Al3Ti0.4Zr0.6is a new kind of intermetallic compound, some properties of which fall in between those of Al3Ti and Al3Zr. Electromagnetic field plays an important part in fining particles and promoting their uniform distribution. When the electromagnetic induced intensity is 0.05T the particles have 0.5-2μm average size and uniform distribution in matrix. The crystal grains of matrix resemble equiaxed ones. The average size of grains are nearly 100μm, 50μm and 25μm when the electromagnetic induced intensities are 0, 0.025T and 0.05T seperately.

Ti2AlC/TiAl Matrix Intermetallic Compound Prepared by In Situ Hot Pressing

2014 ◽  
Vol 602-603 ◽  
pp. 515-518
Author(s):  
Tao Tao Ai ◽  
Fen Wang ◽  
Chen Hui Yang
Keyword(s):  
Intermetallic Compound ◽  
Hot Pressing ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Pressing Method ◽  
Temperature Oxidation ◽  
Tial Intermetallic Compound ◽  
Increasing Temperature ◽  
Sintered Product

As the new structural material, TiAl intermetallic compound has great potential application in aerospace engine, energy and automotive fields. But the bottleneck problems including poor room temperature ductility and high-temperature oxidation resistance limit its application. Ti2AlC possesses an unusual combination of the merits of both metals and ceramics, which is considered the best reinforcement for TiAl intermetallic compound. In the present work, Ti2AlC/TiAl matrix intermetallic compound was successfully fabricated by in situ hot pressing method from the mixture of Ti/Al/TiC. The phase transitions were investigated by differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The microstructure of the product was studied by scanning electron microscopy (SEM). Ti reacted with Al liquids to form Ti-Al intermetallics below 900 °C firstly. With increasing temperature (above 900 °C), a part of TiAl intermetallics reacted with TiC to form Ti2AlC reinforcement. The as-sintered product presented dense and typical lamellar structure. The in-situ synthesized fine Ti2AlC contributed to improve the strength of TiAl matrix intermetallic compound.

Sign in / Sign up

Export Citation Format

Share Document