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材料导报  2018, Vol. 32 Issue (6): 957-960    https://doi.org/10.11896/j.issn.1005-023X.2018.06.019
  材料研究 |
机械化学合成Ni2Al3/Al2O3去合金化制备Raney-Ni/Al2O3复合粉体
刘第强1, 贾建刚2, 高昌琦2, 王建宏1
1 中北大学材料科学与工程学院,太原 030051;
2 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州 730050
Preparation of Raney-Ni/Al2O3 Powder Composites by De-alloying of Mechanochemical Synthesized Ni2Al3/Al2O3 Powders
LIU Diqiang1, JIA Jiangang2, GAO Changqi2, WANG Jianhong1
1 School of Materials Science and Engineering,North University of China,Taiyuan 030051;
2 State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology,Lanzhou 730050
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摘要 以NiO粉和Al粉为原料,采用机械球磨诱发化学反应制备了Ni2Al3/Al2O3复合粉体。利用X射线衍射仪(XRD)和附带能量色散谱仪(EDS)的扫描电子显微镜(SEM)对复合粉体球磨过程中的固态反应过程、表面形貌进行表征。将Ni2Al3/Al2O3复合粉体用浓度为20%的NaOH溶液腐蚀2 h,可得到纳米晶结构的Ni/Al2O3复合粉体。利用XRD和TEM对其物相和结构进行了表征。结果表明,球磨1 h后混合粉末仍为NiO粉和Al粉,球磨3 h后NiO粉和Al粉在机械力的作用下反应形成Ni2Al3和Al2O3粉体,机械力诱发的NiO和Al之间的反应属于突发型反应,继续球磨10 h后形成Ni2Al3/Al2O3复合粉体。Ni2Al3/Al2O3复合粉体在70 ℃、质量比为20%NaOH溶液中刻蚀2 h,可获得Ni/Al2O3复合粉体。
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刘第强
贾建刚
高昌琦
王建宏
关键词:  Raney-Ni  去合金化  机械化学合成  Ni2Al3    
Abstract: Ni2Al3/Al2O3 powder composites were synthesized by mechanochemical reaction of NiO-Al powder mixtures. Phase evolution and structural development during ball milling were investigated by XRD, SEM equipped with EDS. Ni2Al3/Al2O3 were leached in 20% sodium hydroxide solution for 2 h,to obtain Ni/Al2O3 with the grain size of a nano-scale level. The phase composition and the microstructure were studied by XRD and TEM. The results showed that the phase composition of the NiO-Al powder mixtures remained unchanged after 1 h of ball milling. Mechanochemical reaction between NiO and Al powders under the mechanical forces Ni2Al3 and Al2O3 were formed after 3 h of balling. The mechanically activated reaction between NiO and Al occurred in sudden. Ni2Al3/Al2O3 powder composites were formed after 10 h of ball milling. Ni2Al3/Al2O3 powder composites were etched in a 20% sodium hydroxide solution at 70 ℃ for 2 h and Ni/Al2O3 powder composites was obtained.
Key words:  Raney-Ni    de-alloying    mechanochemical synthesis    Ni2Al3
               出版日期:  2018-03-25      发布日期:  2018-03-25
ZTFLH:  TB34  
基金资助: 国家自然科学基金(51461029); 山西省重点研发计划项目(2016603D12102-1)
作者简介:  刘第强:女,1989年生,硕士研究生,主要研究方向为陶瓷基复合材料 E-mail:liudiqiangj@163.com;贾建刚:男,1977年生,博士,副教授,主要研究方向为新型金属基复合材料 E-mail:lzhjiajiangang@163.com
引用本文:    
刘第强, 贾建刚, 高昌琦, 王建宏. 机械化学合成Ni2Al3/Al2O3去合金化制备Raney-Ni/Al2O3复合粉体[J]. 材料导报, 2018, 32(6): 957-960.
LIU Diqiang, JIA Jiangang, GAO Changqi, WANG Jianhong. Preparation of Raney-Ni/Al2O3 Powder Composites by De-alloying of Mechanochemical Synthesized Ni2Al3/Al2O3 Powders. Materials Reports, 2018, 32(6): 957-960.
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http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2018.06.019  或          http://www.mater-rep.com/CN/Y2018/V32/I6/957
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