分类: 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间: 2017-05-02
摘要: The operating temperature dependence of dynamic magnetic characteristics of the annealed Fe78Si13B9 amorphous alloy core was systematically investigated. The core loss, magnetic induction intensity and complex permeability of the amorphous core were analyzed by means of AC B–H loop tracer and im- pedance analyzer. It is found that the operating temperature below 403 K has little impact on core loss when the induction (B) is less than 1.25 T. As B becomes higher, core loss measured at high temperature becomes higher. For the cores measured at power frequency, the B at 80 A/m and the coercivity (Hc) at 1 T decline slightly as the temperature goes up. Furthermore, the real part of permeability (μ′) increases with the rise of temperature. The imaginary part of permeability (μ′′) maxima shifts to lower frequency side with increasing temperature, indicating the magnetic relaxation behavior in the sample. In addition, with the rise in the operating temperature of the annealed amorphous core, the relaxation time tends to increase.
提交时间: 2017-05-02
摘要: The flexural strength reliability of bulk metallic glasses [BMGs] plates is analyzed using Weibull statistics. The Weibull modulus [m] and characteristic strength [sigma[0]] of the Zr48Cu45Al7 BMG are 34 and 2630 MPa, respectively, which are much higher t