To obtain high reliability of surface acoustic wave(SAW)devices,Mo was added to Al electrodes on 128°Y-X LiNbO_3 substrates by a d.c.magnetron sputtering deposition.Influence of Mo additive on the mechanical prop...To obtain high reliability of surface acoustic wave(SAW)devices,Mo was added to Al electrodes on 128°Y-X LiNbO_3 substrates by a d.c.magnetron sputtering deposition.Influence of Mo additive on the mechanical properties of Al films was investigated.It was found that the Al-Mo alloy films displayed a superior adhesion to substrates.With the Al-Mo alloy films,a 1.65 GHz-range image-impedance connected SAW filter was designed and fabricated.In this structure of SAW filter, for satisfying stopband requirements a dual-track structure was applied.Withdrawal weighting of interdigital transducers(IDT) was used to adjust the bandwidth of SAW filter.展开更多
The microstructure of a spray deposited intermetallic compound alloy of Ni-Al-Mo system（Ni3Al-Mo intermetallic compound alloy） prepared by a spray atomization deposition was studied in detail by using optical metall...The microstructure of a spray deposited intermetallic compound alloy of Ni-Al-Mo system（Ni3Al-Mo intermetallic compound alloy） prepared by a spray atomization deposition was studied in detail by using optical metallography,XRD,DTA,SEM,TEM,HREM and computer simulation.The preform consists of uniform and equiaxial grains,ranging from 10-40 μm,with some microporosity.Besides the main phases of the matrix alloy γ＇ and γ,Ni2Mo and Ni3Mo phases are also found within the γ network.A new Ni enriched phase in the γ phase was identified to have face-centered cubic structure with a lattice constant α=1.09 nm and space group Fm3m.展开更多
文摘To obtain high reliability of surface acoustic wave(SAW)devices,Mo was added to Al electrodes on 128°Y-X LiNbO_3 substrates by a d.c.magnetron sputtering deposition.Influence of Mo additive on the mechanical properties of Al films was investigated.It was found that the Al-Mo alloy films displayed a superior adhesion to substrates.With the Al-Mo alloy films,a 1.65 GHz-range image-impedance connected SAW filter was designed and fabricated.In this structure of SAW filter, for satisfying stopband requirements a dual-track structure was applied.Withdrawal weighting of interdigital transducers(IDT) was used to adjust the bandwidth of SAW filter.
基金Funded by the Innovation Fund for Outstanding Scholar of Henan Province(No.0621000700)
文摘The microstructure of a spray deposited intermetallic compound alloy of Ni-Al-Mo system（Ni3Al-Mo intermetallic compound alloy） prepared by a spray atomization deposition was studied in detail by using optical metallography,XRD,DTA,SEM,TEM,HREM and computer simulation.The preform consists of uniform and equiaxial grains,ranging from 10-40 μm,with some microporosity.Besides the main phases of the matrix alloy γ＇ and γ,Ni2Mo and Ni3Mo phases are also found within the γ network.A new Ni enriched phase in the γ phase was identified to have face-centered cubic structure with a lattice constant α=1.09 nm and space group Fm3m.
基金National Natural Science Foundation of China(51775189)Science and Technology Commission of Shanghai Municipality Project(16DZ2260604)Aviation Fund(2015ZES7001)
