中国有色金属学报
中國有色金屬學報
중국유색금속학보
THE CHINESE JOURNAL OF NONFERROUS METALS
2012年
5期
1118-1122
,共5页
李丽娅%易健宏%李爱坤%彭元东%夏庆林
李麗婭%易健宏%李愛坤%彭元東%夏慶林
리려아%역건굉%리애곤%팽원동%하경림
SmCo7型永磁材料%Cr3C2%快淬%非晶化%磁滞回线
SmCo7型永磁材料%Cr3C2%快淬%非晶化%磁滯迴線
SmCo7형영자재료%Cr3C2%쾌쉬%비정화%자체회선
SmCo7-type permanent magnets%Cr3C2%melt spinning%amorphization%hysteresis loops
通过X射线衍射法(XRD)、差示扫描量热法(DSC)和磁性测量等方法系统研究Cr3C2含量和快淬速度对SmCo7-x(Cr3C2)x(x＝0.10-0.25)非晶化行为的影响.结果表明,在低的快淬速度下(20 m/s)下,合金主要由SmCo7主相和少量Sm2Co17R相构成,且SmCo7相的晶粒尺寸随着Cr3C2含量x的增加而减小.随着快淬速度的增加,合金的XRD衍射峰强度变弱、衍射峰宽化,表明SmCo7主相的晶粒尺寸随着快淬速度的增加而减小.当快淬速度增加至40 m/s时,SmCo7-x(Cr3C2)x(0.15≤x≤0.25)合金均形成了非晶态结构,合金的磁滞回线表现为软磁性的窄回线,矫顽力为0.004～0.007 T.采用DSC对合金的晶化行为分析表明,在650℃时SmCo7相首先从非晶基体中析出,在770℃时Sm2Co17相析出.
通過X射線衍射法(XRD)、差示掃描量熱法(DSC)和磁性測量等方法繫統研究Cr3C2含量和快淬速度對SmCo7-x(Cr3C2)x(x＝0.10-0.25)非晶化行為的影響.結果錶明,在低的快淬速度下(20 m/s)下,閤金主要由SmCo7主相和少量Sm2Co17R相構成,且SmCo7相的晶粒呎吋隨著Cr3C2含量x的增加而減小.隨著快淬速度的增加,閤金的XRD衍射峰彊度變弱、衍射峰寬化,錶明SmCo7主相的晶粒呎吋隨著快淬速度的增加而減小.噹快淬速度增加至40 m/s時,SmCo7-x(Cr3C2)x(0.15≤x≤0.25)閤金均形成瞭非晶態結構,閤金的磁滯迴線錶現為軟磁性的窄迴線,矯頑力為0.004～0.007 T.採用DSC對閤金的晶化行為分析錶明,在650℃時SmCo7相首先從非晶基體中析齣,在770℃時Sm2Co17相析齣.
통과X사선연사법(XRD)、차시소묘량열법(DSC)화자성측량등방법계통연구Cr3C2함량화쾌쉬속도대SmCo7-x(Cr3C2)x(x＝0.10-0.25)비정화행위적영향.결과표명,재저적쾌쉬속도하(20 m/s)하,합금주요유SmCo7주상화소량Sm2Co17R상구성,차SmCo7상적정립척촌수착Cr3C2함량x적증가이감소.수착쾌쉬속도적증가,합금적XRD연사봉강도변약、연사봉관화,표명SmCo7주상적정립척촌수착쾌쉬속도적증가이감소.당쾌쉬속도증가지40 m/s시,SmCo7-x(Cr3C2)x(0.15≤x≤0.25)합금균형성료비정태결구,합금적자체회선표현위연자성적착회선,교완력위0.004～0.007 T.채용DSC대합금적정화행위분석표명,재650℃시SmCo7상수선종비정기체중석출,재770℃시Sm2Co17상석출.
The effects of the Cr3C2 content and wheel speed on the amorphization behavior of the melt-spun SmCo7-x(Cr3C2)x (x=0.10-0.25) alloys were studied systematically by X-ray diffraction analysis (XRD),differential scanning calorimetry (DSC) and magnetic measurements.The ribbon melt-spun at lower wheel speed (20 m/s) has composite structure composed of mostly SmCo7 and a small amount of Sm2Co17R.The grain size of SmCo7 phase decreases with the increase of Cr3C2 content.With the increase of wheel speed,the XRD peaks become lower and accompanied with a broad increase in backgrounds,indicating a considerable decrease in the grain size of the SmCo7 phase.When the wheel speed increases to 40 m/s,SmCo7-x(Cr3C2)x alloys can be obtained in the amorphous state for 0.15≤x≤0.25 with intrinsic coercive Hci of 0.004-0.007 T.The DSC analysis reveals that SmCo7 phase firstly precipitates from the amorphous matrix at 650 ℃,followed by the crystallization of Sm2Co17 phase at 770 ℃.
