Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第28卷    第8期    总第233期    2018年8月

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文章编号:1004-0609(2018)-08-1603-06
FeCoCu预合金粉前驱体制备及性能
谢德龙,林 峰,方啸虎,秦海青,潘晓毅,陈 超,肖乐银

(中国有色桂林矿产地质研究院有限公司 广西超硬材料重点实验室,国家特种矿物材料工程技术研究中心,桂林 541004)

摘 要: 通过共沉淀法制备FeCoCu预合金粉前驱体,对制备过程中的主要影响因素进行了探讨,并对前驱体的物相组成、微观形貌及加热分解行为进行表征与分析。结果表明,FeCoCu预合金粉前驱体的最佳制备工艺为:在沉淀剂草酸溶液浓度为1.0 mol/L时,反应体系的pH值为2.0,混合金属盐溶液浓度为1.0 mol/L,反应温度为50 ℃,在此条件时既有最高的收得率,也有较细的粉末粒度。SEM及XRD衍射结果表明,前驱体形貌为表面比较光滑的颗粒状,其主要物相是FeC2O4?2H2O、CoC2O4?2H2O、CuC2O4?nH2O等3种草酸盐结晶水合物。DSC曲线表明,前驱体在加热时存在着两个吸热峰,分别对应的是草酸盐沉淀物结晶水的脱水过程和草酸盐的热分解过程。

 

关键字: FeCoCu预合金粉;前驱体;制备;性能

Preparation and properties of FeCoCu pre-alloyed powder precursors
XIE De-long, LIN Feng, FANG Xiao-hu, QIN Hai-qing, PAN Xiao-yi, CHEN Chao, XIAO Le-yin

Guangxi Key Laboratory of Superhard Materials, National Engineering and Technology Research Center for Special Mineral Materials, China Nonferrous Metal (Guilin) Geology and Mining Co., Ltd., Guilin 541004, China

Abstract:The FeCoCu pre-alloyed powder precursors were manufactured by co-precipitation method and the major influence factors of the preparation process were discussed. The phase composition, microstructure and heating decomposition behavior were analyzed. The results show that the optimal preparation parameters are that the pH is 2.0, the solution concentration is 1.0 mol/L and the reaction temperature is 50 ℃ (when the concentration of the precipitant is 1.0 mol/L); under these conditions, the pre-alloyed powders have the highest gain-quotiety and the finest particle size. The SEM images show that the microstructure of the precursors is smooth particle and the XRD patterns show that the FeC2O4?2H2O, CoC2O4?2H2O and CuC2O4?nH2O are the main phases. The DSC curves show that two endothermic peaks exit in the heating process, which correspond to the crystal water dehydration and the oxalates decomposition, respectively.

 

Key words: FeCoCu pre-alloyed powder; precursor; preparation; property

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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