清代陕甘人口专题研究
In: Ma ke si zhu yi yan jiu
In: Zhe xue she hui ke xue yan jiu 22
In: 马克思注意研究
In: 哲学社会科学研究 22
4 Ergebnisse
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In: Ma ke si zhu yi yan jiu
In: Zhe xue she hui ke xue yan jiu 22
In: 马克思注意研究
In: 哲学社会科学研究 22
As a representative of immiscible alloy systems, the Cu-Ta system was the research topic because of its potential application in industry, military and defense fields. In this study, an amorphous Cu-Ta alloy film was manufactured through magnetron sputter deposition, which was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Mechanical properties of Cu-Ta film were detected by the nanoindentation method, which show that the elastic modulus of Cu3.5Ta96.5 is 156.7 GPa, and the hardness is 14.4 GPa. The nanoindentation process was also simulated by molecular dynamic simulation to indicate the deformation mechanism during the load-unload stage. The simulation results show that the structure and Voronoi cells decreased by 0.1% at 50 Ps and then remained at this value during the nanoindentation process. In addition, the number of dislocations vary rapidly with the depth between indenter and surface. Based on the experimental and simulation results, the Voronoi structural changes and dislocation motions are the key reasons for the crystallization of amorphous alloys when loads are applied.
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In: Environmental science and pollution research: ESPR, Band 30, Heft 38, S. 89535-89547
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 30, Heft 20, S. 57279-57301
ISSN: 1614-7499