材料期刊网

MAGNETIC PROPERTIES OF Nd_2(Fe_(1-x)M_x)_(14)B(M=C,Si)ALLOYS

XING Feng JIANG Chao HE Wenwang Department of Physics , Peking University , Beijing , China [Originally published in ACTA METALL SIN (CHINESEEDN) 24 (5) 1988pp B348—B352 , received 22 October 1986:in revised form 8 May 1987]

金属学报(英文版)

The magnetic properties of Nd_2(Fe_(1-x)M_x)_(14)B(M=C and Si) compounds have been investi- gated.Substituting Fe by small amount of metalloid C and Si atoms,the compounds are in tetragonal structure and have uniaxial anisotropy.The substitution of C for part of Fe de- creases the Curie temperature of the compounds and the intrinsic coercivity of bond samples at low temperature.The replacement of Fe by Si makes the Curie temperature increase with a maximum at the vicinity of x=0.15.When the range of the content of Si is 0≤x≤0.10,the coercivity distinctly increases at room temperature.from 62.7 kA/m at x=0 to 138.7kA/m at x=0.06,where the residual magnetization has a maximum:in the mean time the saturation magnetization decreases only by a small amount.

关键词: Nd-Fe-B alloy , null , null

金属学报 第22卷 A辑 1986年 总目次

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Fractal growth and form by molecular dynamics

材料科学技术（英文）

The fractal growth and form is considered by molecular dynamics and simulated using computer.

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Microstructure and Mechanical Properties of Two-phase TiAl Alloys in Lamellar Form

Masaharu Yamaguchi and Haruyuki Inui(Department of Metal Science and Technology , Kyoto University , Sakyo-ku , Kyoto 606 , Japan)

材料科学技术（英文）

In two-phase TiAl alloys, the lamellar structures are of special interest and importance since they are so common and persistent. not only under as-cast conditions but also after thermal treatment. However. the lamellar structures are still poor in ductility,although they are beneficial for toughness and high temperature strength. This article will review the recent progress made in understanding the basic mechanical properties of the γ and α2 phases which comprise the two-phase alloys in Iamellar form, and discuss how an improved balance of strength and ductillty in the lamellar form may be achieved

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金属学报 第22卷 A辑 1986年 分类索引

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金属学报 第22卷 B辑 1986年 分类索引

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金属学报 第22卷 B辑 1986年 作者索引

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金属学报 第22卷 B辑 1986年 总目次

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FORM AND EFFECT OF Zr IN CuCoBeZr ALLOY

LIU Hefa SUN Naizhen DAI Xueli REN He Zhenjiang Shipbuilding Institute , Zhenjiang , Jiangsu , ChinaLI Lijun Shanghai , Electrical Machinery Plant.Shanghai.China professor.Institute of Metallic Materials Research , Zhenjiang Shipbuilding Institute , Zhenjiang , Jiangsu 212003 , China

金属学报(英文版)

Precipitation form of Zr in CuCoBeZr alloy during solidificotion.cooling and final aging,as well as its effect on the high temperature properties have been studied and discussed.Results show that during solidificotion and cooding.Zr precipitates as fine particle.Cu_3Zr,which pre- vents X-Cu grains from growing and provides more nuclei for CoBe and hence leads to finer primary CoBe.Fine Cu_3Zr partrticles also precipitate during aging. Because Co_3Zr is difficult to coalesce at high temperatures,the recrystallization temper- uture increases and the high temperature mechanical properties improve.

关键词: CuCoBeZr alloy , null