| Neutron is widely applied in many domains of metallurgy, chemistry, food, neutron photography, and petroleum or geology exploration. Materials of target is the key component of apparatus for neutron occurrence and now metal Ti or Zr is the most popular adopted used as materials of target in the domestic research. Materials of target requires high density of Tritium, high performance of heat stability, low percent of power lose and high fixation of helium. While nuclear pipe in China is behindhand, now the domestic scientific researches are on great need of keeping up with the overseas level for new target materials and models at present.The Tritium target is the materials of target absorbed tritium. For the atom of tritium contain radio, in common studying it uses the atom of deuterium in small difference in separation coefficient with the tritium atom to replace the atom of tritium.Aim at the long period, progress slowly and theories weakly in the searching the neutron tube material of target, this essay enucleates the performances of alloy TiV on deuterium and helium store from the angle of energy on the basis of analysis for the characteristic and design requirement of tritium target. The related experiments are finished and the important academic and laboratorial data are also included. The analysis of XRD and related accurate calculations have showed that when V%<4.0%, the major factor is the vanadium atom radius which lead the transformation of a and c of crystal parameters after the vanadium entered the crystal lattice of titanium; when V%>4.0%, the factors become the radius and electricity of the vanadium atom. So there are different change tides to the parameters a and c. The space between A and B side of arrange tightly of atoms along with the increase of V% in the alloys, the aberration is bigger in the c axis of crystal cell, and the volume of crystal cell takes on downtrend. The XRD analysis of TIVD alloy show that a value and the volume of crystal cell take on downtrend along with the increase of V%. The XPS has showed that a lot of element C and O have been existed on surface and inner membrane of alloy for 10-4Pa in the vacuum spatter room, and element Ti is mainly existed by TiO2 on surface, by mixture of Ti,TiO,Ti2O,Ti2O3 and TiC inner. So it can't get result that Ti2p peak is how to be influenced by the other alloy elements in the samples. But there is differentiation in surface in membrane of alloy and alloy piece, that is that except Ti4+,there are also low value Ti in the surface of membrane of alloy and the Ti of alloy piece surface only existed with Ti4+.The surface of alloy piece has adsorbed much C and O and clean surface can be attained after bombardment by Ar+. The binding energy of spectrum peak of Ti2p on the clean alloy increases with the content of V gets up. This phenomenon results in one electron added that V atom compares with Ti atom and average distance between the alloy atoms changes with the content V, so the electron density in crystal lattice increases and the alloy combine strength buildup. Then the alloy stabilization increased.Considering with the accurate unit cell parameter, the combined energy of each tetrahedron gap made of TiV and TiVD. In the HCP structure of alloy TiV, with atom V goes in, the intensity between atoms and the stability of system will increase. While a little atom H go into the unit cell of metal, the stability of system will increase with the content V goes up. In the FCC structure of alloy TiVD, the combined energy of Ti3V1D increases with the increase of content V while combined energy of Ti4D debases when the content V is over 7.5%. These illuminate the increase of Ti3V1 will benefit for the store of atom D. The combined energy of Ti6He contained He increases with the content V increases, and combined energy of Ti5V1He over and above the energy of Ti6He when content V is same. These illuminate that the proper content of atom V will do good for the store of atom He, while the properties of store He in alloy will decrease qui... |
PDF Full Text Request