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
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.
1 Cai Jing. Fabrication of nonoporous nickel films by dealloying and their electrochemical properties[D].Hangzhou:Zhejiang University,2013(in Chinese). 蔡荆. 脱合金法制备纳米多孔镍膜及电化学性能研究[D].杭州:浙江大学,2013. 2 Masataka Hakamada, Mamoru Mabuchi. Nanoporous nickel fabricated by dealloying of rolled Ni-Mn sheet[J].Procedia Engineering,2014,81:2159. 3 Kan Yide,Liu Wenjin,Zhong Minlin, et al. Development of nanoporous metals prepared by dealloying[J].Heat Treatment of Metals,2008,33(3):43(in Chinese). 阙义德,刘文今,钟敏霖,等.脱合金法制备纳米多孔金属的研究进展[J].金属热处理,2008,33(3):43. 4 Hayes J R, Hodge A M, Biener J,et al. Monolithic nanoporous copper by dealloying Mn-Cu[J].Journal of Materials Research,2006,21:2611. 5 Huang J F, Sun I W. Fabrication and surface functionalization of nanoporous gold by electrochemicial alloying/dealloying of Au-Zn in an ionic liquid, and the self-assembly of l-cysteine nonolyers[J].Advanced Functional Materials,2005,15:989. 6 Thorp J C, Sieradzki K, Tang L,et al. Formation of nanoporous noble metal thin films by electrochemical dealloying of PtxSi1-x[J].Applied Physics Letters,2006,88:033110. 7 Lu H B, Li Y, Wang F H. Synthesis of porous copper from nanocrystalline two-phase Cu-Zr film by dealloying[J].Scripta Materialia,2007,56:156. 8 Pickering H W. Characteristic features of alloy polarization curves[J].Corrosion Science,1983,23:1107. 9 Qi Zhen, Zhang Zhonghua, Jia Haoling,et al. Alloy composition dependence of formation of porous Ni prepared by rapid solidification and chemical dealloying[J].Journal of Alloys and Compounds,2009,472:71. 10 Mészáros S, Halász J, Kónya Z, et al. Search for a Raney-Ni type catalyst efficient in the transformation of excess glycerol into more valuable products[J].Catalysis Communications,2014,43:116. 11 Mulli A M, Bigg T D, Adkins N J. A microstructural investigation of gas atomized Raney type Al-27.5at% Ni catalyst precursor alloys[J].Journal of Alloys and Compounds,2015,648:139. 12 Devred F, Gieske A H, Adkins N, et al. Influence of phase composition and particle size of atomised Ni-Al alloy samples on the catalytic performance of Raney-type nickel catalysts[J].Applied Catalysis A:General,2009,356:154. 13 Wang R, Chen H, Lu Z,et al. Structural transitions during aluminum leaching of NiAl3 phase in a Raney Ni-Al alloy[J].Journal of Materials Science,2008,43:5712. 14 Sane S, Bonninr J H, Damon J P,et al. Raney metal catalysts: I comparative properties of raney nickel proceeding from Ni-Al intermetallic phases[J].Applied Catalysis,1984,9:69. 15 Petró J, Bóta A, László K,et al. A new alumina-supported, not pyrophoric Raney-type Ni-catalyst[J].Applied Catalysis A:General,2000,190(1-2):73. 16 Wu Haitao. Preparation and characterization of nana-porous nickel-based alloys[M].Lanzhou:Lanzhou University of Technology,2012(in Chinese). 吴海涛. 纳米多孔镍基合金的制备与表征[M].兰州:兰州理工大学,2012.
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2018, Vol. 32 
