مرکز منطقه ای اطلاع رساني علوم و فناوري - Structure and magnetic properties of Sm(CobalFexTi0.05)9.66 alloys (x=0-0.57) and Sm(Co0.66Fe0.19Ti0.05Cu0.1)9.66 magnets

DocumentCode :

848344

Title :

Structure and magnetic properties of Sm(Co_balFe_xTi_0.05)_9.66 alloys (x=0-0.57) and Sm(Co_0.66Fe_0.19Ti_0.05Cu_0.1)_9.66 magnets

Author :

Huang, M.Q. ; Fingers, R.T. ; Turqut, Z. ; Swaminathan, R. ; Johnson, F. ; McHenry, M.E. ; Ma, B.M. ; Ramanan, V.R.

Author_Institution :

UES Inc., Dayton, OH, USA

Volume :

Issue :

fYear :

2002

fDate :

9/1/2002 12:00:00 AM

Firstpage :

2946

Lastpage :

2948

Abstract :

Potential permanent magnetic materials with compositions of Sm(Co_balFe_xTi_0.05)_9.66 (x=0-0.57) have been synthesized and characterized in the temperature range of 10-1473 K and at fields up to 5 T. The experimental results show that near single phase materials with Th₂Ni₁₇ structure were formed in Sm(Co_balFe_xTi_0.05)_9.66 alloys after splat quenching from 1473 K. The Ti atoms play an important role in stabilizing the Th₂Ni₁₇ structure for the 3d (transition metal) rich nonstoichiometric 2-17 compounds. Encouraging hard magnetic properties with T_c∼890-1066 K, M_s∼10.8-13.7 kG, H_a∼30-125 kOe at 300 K were observed in Sm(Co_balFe_xTi_0.05)_9.66 alloys. Both Sm(Co_0.66Fe_0.19Ti_0.05Cu_0.1)_9.66 sintered and melt-spun powder magnets with 4πM_s≥10 kG were fabricated. A strong domain wall pinning behavior with H_c∼1.6 kOe at RT and H_c∼4.3 kOe at 10 K was observed. The effect of different heat treatment conditions on the phase formation of Sm(Co_balFe_xTi_0.05)_9.66 alloys was also discussed.

Keywords :

Curie temperature; cobalt alloys; coercive force; copper alloys; crystal structure; ferromagnetic materials; heat treatment; iron alloys; magnetic anisotropy; magnetic domain walls; magnetisation; melt spinning; permanent magnets; samarium alloys; sintering; splat cooling; titanium alloys; 10 to 1473 K; 5 T; Curie temperature; Sm(Co_0.66Fe_0.19Ti_0.05Cu_0.1)_9.66; Sm(Co_0.66Fe_0.19Ti_0.05Cu_0.1)_9.66 magnet; Sm(Co_balFe_xTi_0.05)_9.66 alloy; Sm(CoFeTi_0.05)_9.66; Th₂Ni₁₇ structure; coercivity; domain wall pinning; hard magnetic properties; heat treatment; high temperature permanent magnet; melt spinning; phase formation; powder magnet; saturation magnetization; single phase material; sintering; splat quenching; structural properties; uniaxial anisotropy; Composite materials; Inorganic materials; Iron alloys; Magnetic materials; Magnetic properties; Magnets; Nickel alloys; Powders; Temperature distribution; Titanium alloys;

fLanguage :

English

Journal_Title :

Magnetics, IEEE Transactions on

Publisher :

ieee

ISSN :

0018-9464

Type :

jour

DOI :

10.1109/TMAG.2002.803179

Filename :

1042419

Link To Document :

https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=848344