| With the development of Chinese nuclear power industry, the stable structural materials used inreactors are strongly required. Since traditional Zr alloy can not meet the requirement to extendservice life of reactor, amorphous alloys may be a kind of potential nuclear materials with manyunique properties, in particular, good radiation resistance. In this paper, the preparation, structure andproperties of this kind of materials were investigated.Magnetron co-sputtering was used to prepare a series of ZrCu films. The structure of ZrCu filmswas characterized using X-ray diffraction and high resolution transmission electron microscope.Mechanical properties testing were carried out for the films with different composition. It is found thatthe ZrCu amorphous films can be prepared with the compositions ranged from Zr40Cu60to Zr80Cu20,In XRD spectra, the broad peaks denoting the amorphous nature shift to smaller two theta values withincrease of Zr concentration. The composition of Zr65Cu35possesses better glass-forming ability. Andthe mechanical properties of the films were slightly change in the compositions ranged fromZr47.5Cu51.5to Zr80Cu20.The optimal amorphous composition was determined to be Zr65Cu35. Mechanical propertiestesting and electrochemical corrosion testing were carried out for the Zr65Cu35films and thefilm/substrate composite materials. It is found that the film with30-minute sputtering after annealinghas the minimum change in the adhesion strength, and has the highest hardness. Compared with thepure Zr plate with the same size and shape, the Zr substrate coated with Zr65Cu35amorphous filmpossesses a larger tensile strength, bending strength, and better corrosion resistance.Zr48Cu45Al7amorphous ribbons were obtained by single-roller melt spinning. Synchrotronradiation technology was used to research the atomic structure of Zr48Cu45Al7prepared and annealedmetallic glasses. It is found that the interaction of Zr-Al pairs is different between these two samplesthat the distribution of the Zr-Al atomic separations is much narrower in the annealed Zr48Cu45Al7,which may enhance the ordering at the short range. In addition, the volumes of the Al(solute)-centeredVoronoi clusters obviously expand in the annealed Zr48Cu45Al7, which indicates that the atoms possessa lower packing efficiency inside the clusters after annealing, resulting in the ease of rearrangement ofatoms and the corresponding transformation of clusters. |
