TEM INVESTIGATIONS OF WC-Co ALLOYS AFTER CREEP EXPERIMENTS

1986 ◽  
Vol 47 (C1) ◽  
pp. C1-685-C1-689 ◽  
Author(s):  
S. LAY ◽  
F. OSTERSTOCK ◽  
J. VICENS
Keyword(s):  
Co Alloys

Lorentz microscopy study of magnetic domain walls in Fe-Cr-Co alloys

1978 ◽  
Vol 36 (1) ◽  
pp. 462-463
Author(s):  
Yalcin Belli
Keyword(s):  
Domain Walls ◽  
Magnetic Domain ◽  
Microscopy Study ◽  
Ferromagnetic Phase ◽  
Stable Phase ◽  
Magnetic Domains ◽  
Lorentz Microscopy ◽  
Magnetic Hardening ◽  
Electron Microscopes ◽  
Co Alloys

Fe-Cr-Co alloys have great technological potential to replace Alnico alloys as hard magnets. The relationship between the microstructures and the magnetic properties has been recently established for some of these alloys. The magnetic hardening has been attributed to the decomposition of the high temperature stable phase (α) into an elongated Fe-rich ferromagnetic phase (α1) and a weakly magnetic or non-magnetic Cr-rich phase (α2). The relationships between magnetic domains and domain walls and these different phases are yet to be understood. The TEM has been used to ascertain the mechanism of magnetic hardening for the first time in these alloys. The present paper describes the magnetic domain structure and the magnetization reversal processes in some of these multiphase materials. Microstructures to change properties resulting from, (i) isothermal aging, (ii) thermomagnetic treatment (TMT) and (iii) TMT + stepaging have been chosen for this investigation. The Jem-7A and Philips EM-301 transmission electron microscopes operating at 100 kV have been used for the Lorentz microscopy study of the magnetic domains and their interactions with the finely dispersed precipitate phases.

The effect of HCP on the formation of twin boundaries and dislocations in Ni–Co alloys

2021 ◽  
Vol 29 ◽  
pp. 18-23
Author(s):  
Rui-bo Ma ◽  
Li-li Zhou ◽  
Yong-chao Liang ◽  
Qian Chen ◽  
Ze-an Tian ◽  
...  
Keyword(s):  
Twin Boundaries ◽  
Co Alloys

Effect of the Ni content on the thermal and magnetic properties of Fe–Ni–Co alloys

2021 ◽  
Vol 261 ◽  
pp. 124215
Author(s):  
A. Paganotti ◽  
C.V.X. Bessa ◽  
C.C.S. Silva ◽  
E.B. Peixoto ◽  
J.G.S. Duque ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Ni Content ◽  
Co Alloys

scholarly journals Short and Medium-Range Order in Liquid Ternary Al80Co10Ni10, Al72.5Co14.5Ni13, and Al65Co17.5Ni17.5 Alloys

2010 ◽  
Vol 65 (1-2) ◽  
pp. 123-131 ◽  
Author(s):  
Oleksandr S. Roik ◽  
Oleksiy Samsonnikov ◽  
Volodymyr Kazimirov ◽  
Volodymyr Sokolskii
Keyword(s):  
Three Dimensional ◽  
Range Order ◽  
Ternary Alloys ◽  
X Ray Diffraction ◽  
Medium Range Order ◽  
Intermediate Range Order ◽  
Transition Metal Atoms ◽  
Medium Range ◽  
Three Dimensional Models ◽  
Co Alloys

AbstractA local short-to-intermediate range order of liquid Al80Co10Ni10, Al72.5Co14.5Ni13, and Al65Co17.5Ni17.5 alloys was examined by X-ray diffraction and the reverse Monte Carlo modelling. The comprehensive analysis of three-dimensional models of the liquid ternary alloys was performed by means of the Voronoi-Delaunay method. The existence of a prepeak on the S(Q) function of the liquid alloys is caused by medium range ordering of 3d-transition metal atoms in dense-packed polytetrahedral clusters at temperatures close to the liquidus. The non-crystalline clusters, represented by aggregates of pentagons that consist of good tetrahedra, and chemical short-range order lead to the formation of the medium range order in the liquid binary Al-Ni, Al-Co and ternary Al-Ni-Co alloys.

3D phase field modeling of the morphology of WC grains in WC–Co alloys: The role of interface anisotropy

2021 ◽  
Vol 196 ◽  
pp. 110526
Author(s):  
Han Li ◽  
Yong Du ◽  
Jianzhan Long ◽  
Zhijian Ye ◽  
Zhoushun Zheng ◽  
...  
Keyword(s):  
Phase Field ◽  
Phase Field Modeling ◽  
Field Modeling ◽  
Co Alloys ◽  
Interface Anisotropy

scholarly journals Highly coercive rapidly solidified Sm–Co alloys

2006 ◽  
Vol 99 (8) ◽  
pp. 08B521 ◽  
Author(s):  
S. Aich ◽  
V. K. Ravindran ◽  
J. E. Shield
Keyword(s):  
Rapidly Solidified ◽  
Co Alloys

Magnetoelastic effect in dilute Fe-Co alloys

Physica B+C ◽  
1983 ◽  
Vol 119 (1-2) ◽  
pp. 119-124 ◽  
Author(s):  
S. Ishio ◽  
A. Isomura ◽  
T. Ikeda ◽  
M. Takahashi ◽  
S. Kadowaki
Keyword(s):  
Magnetoelastic Effect ◽  
Co Alloys

scholarly journals High Temperature In-situ Observations of Magnetic Domains in Fe-Co Alloys

2003 ◽  
Vol 44 (12) ◽  
pp. 2570-2577 ◽  
Author(s):  
Koichi Kawahara ◽  
Daisuke Iemura ◽  
Sadahiro Tsurekawa ◽  
Tadao Watanabe
Keyword(s):  
High Temperature ◽  
Magnetic Domains ◽  
Co Alloys
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