FORMATION OF RE(X)NI(Y) (RE=LA, CE, PR OR ND) COMPOUNDS BY CALCIOTHERMIC REDUCTION OF LA2O3, CEO2, PR6O11 AND ND2O3

被引：10

作者：

OHTSUKA, M ^{[1
]}

KIM, DY ^{[1
]}

ITAGAKI, K ^{[1
]}

机构：

[1] KIA STEEL CO LTD,CTR MET RES & DEV,KUNSAN CHEOLLABUKDO,SOUTH KOREA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1995年 / 230卷 / 01期

关键词：

RARE EARTH-NICKEL COMPOUNDS; CALCIOTHERMIC REDUCTION; REDUCTION-DIFFUSION METHOD; REACTION MECHANISM;

D O I：

10.1016/0925-8388(95)01885-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

LaNi5, CeNi5, PrNi5 and NdNi5 powders were prepared from the corresponding oxides by a reduction-diffusion method using calcium as reductant and the morphology of the product and the mechanism of the reaction were examined. It was clarified that CaxNiy compounds formed during the reaction had a significant role in the formation of RE(x)Ni(y). Instead of a common direct reaction of xRE + yNi = RE(x)Ni(y), an indirect substitution reaction of aCa(x)Ni(y) + bRE = cRE(x)Ni(y) + dCa prevailed. This enhanced the rate of formation of RENi(5) significantly.

引用

页码：46 / 52

页数：7

共 7 条

[1]

KIM DY, 1992, J MIN MATER PROCESS, V108, P873

[2]

LI Z, 1993, J ALLOY COMPD, V192, P26

[3]

LI Z, 1992, J MIN MATER PROCESS, V108, P33

[4]

MASSALSKI TB, 1990, BINARY ALLOY PHASE D, V1, P922

[5]

NORTIN M, 1983, ACTA METALL, V31, P903

[6] HIGH-TEMPERATURE PHASE-RELATIONS IN NI-LA, NI-CE, NI-PR, NI-ND BINARY AND TERNARY ALLOY SYSTEMS [J].

QI, GJ ;

LI, ZQ ;

ITAGAKI, K ;

YAZAWA, A .

MATERIALS TRANSACTIONS JIM, 1989, 30 (08) :583-593

[7]

YASUDA K, 1992, J MIN MATER PROCESS, V108, P103

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