In situ high pressure x-ray diffraction and electrical resistance experiments on TiB have been carried out by using a diamond anvil cell device. The results revealed that the sample undergoes a first-order phase trans...In situ high pressure x-ray diffraction and electrical resistance experiments on TiB have been carried out by using a diamond anvil cell device. The results revealed that the sample undergoes a first-order phase transition at pressures of 3.5-5.0 Gpa and 4.0-5.5 Gpa for the x-ray diffraction and electrical resistance experiments, respectively. The parameters of the state equation are calculated before and after the phase transition and compared with the values calculated by Mohn et al. [J. Phys. C: Solid State Phys. 21(1988)2829] using the augmented spherical wave method.展开更多
The pressure effects on crystallization temperature and activation energy of crystallization were measured up to 3GPa.A non-monotonic dependence between them was observed.The results are discussed by the consideration...The pressure effects on crystallization temperature and activation energy of crystallization were measured up to 3GPa.A non-monotonic dependence between them was observed.The results are discussed by the consideration of pressure induced variations of nucleation and growth mechanisms.展开更多
文摘In situ high pressure x-ray diffraction and electrical resistance experiments on TiB have been carried out by using a diamond anvil cell device. The results revealed that the sample undergoes a first-order phase transition at pressures of 3.5-5.0 Gpa and 4.0-5.5 Gpa for the x-ray diffraction and electrical resistance experiments, respectively. The parameters of the state equation are calculated before and after the phase transition and compared with the values calculated by Mohn et al. [J. Phys. C: Solid State Phys. 21(1988)2829] using the augmented spherical wave method.
文摘The pressure effects on crystallization temperature and activation energy of crystallization were measured up to 3GPa.A non-monotonic dependence between them was observed.The results are discussed by the consideration of pressure induced variations of nucleation and growth mechanisms.
