Effects of B and Mo on the magnetic properties of NdFeTi-nitrides with ThMn[sub 12]-type structure

Conference · Mon Nov 01 00:00:00 EST 1993 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:7183931

Kim, Y B; Kim, H T; Kim, C S ^[1]; Kim, T K ^[2]

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1. Korea Research Institute of Standards and Science, Taejon (Korea, Republic of). Magnetics Lab.
2. Chungnam National Univ., Taejon (Korea, Republic of). Dept. of Metallurgical Engineering

The alloys having nearly single phase of ThMn[sub 12]-type structure (1-12 phase) have been successfully synthesized in NdFe[sub 10.7]Ti[sub 1.3[minus]y]M[sub y] (M = B/Mo) alloy systems by substituting B or Mo up to 23% of Ti (y=0.3). After nitrification, the unit cell volume of 1--12 phase has increased by about 2--3% and a-Fe phase of 5--15 wt.% has been formed depending on the substitutional elements. The nitrides, NdFe[sub 10.7]TiB[sub 0.3]N[sub x] and Nd Fe[sub 10.7]TiMo[sub 0.3]N[sub x], were confirmed to have uniaxial anisotropy by X-ray diffractometry. The results of magnetic measurements for the nitrides have shown that B is very effective for the increase of both Curie temperature and magnetization. On the other band, Mo is effective for the increase of anisotropy field, but it decreases the magnetization. The Curie temperature and magnetization of NdFe[sub 10.7]TiB[sub 0.3]N[sub x] are 560 C and 148 Am[sup 2] /kg, respectively, by about 20% and 15% higher than those of NdFe[sub 10.7]Ti[sub 1.3]N[sub x]. The anisotropy field of NdFe[sub 10.7]TiMo[sub 0.3]N[sub x] is about 7960 kA/m (100 kOe) which is about 25% higher than that of NdFe[sub 10.7]Ti[sub 1.3]N[sub x].

• OSTI ID: 7183931
• Report Number(s): CONF-930416-; CODEN: IEMGAQ
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 29:6Pt1; Conference: INTERMAG '93: international magnetics conference, Stockholm (Sweden), 13-16 Apr 1993; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
BORON
METALLURGICAL EFFECTS
IRON BASE ALLOYS
MAGNETIC PROPERTIES
MOLYBDENUM
NEODYMIUM ALLOYS
PERMANENT MAGNETS
MAGNETIC MATERIALS
TITANIUM ALLOYS
CRYSTAL STRUCTURE
CURIE POINT
EXPERIMENTAL DATA
NITRIDATION
ALLOYS
CHEMICAL REACTIONS
DATA
ELEMENTS
INFORMATION
IRON ALLOYS
MAGNETS
MATERIALS
METALS
NUMERICAL DATA
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SEMIMETALS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
360104* - Metals & Alloys- Physical Properties
420200 - Engineering- Facilities
Equipment
& Techniques