heat of Fusion of metalI. REVIEW ON THE LINDEMANN EQUATION The Debye temperature is an important physical property of metals both in the- ory and practice. According to Lindemann, the relationship between the Debye temperature θ(K) and the melting point T_m (K) can be expressed as萧功伟...
Debye Temperature a physical constant of matter that characterizes numerous properties of solids, such as specific heat, electric conductivity, thermal conductivity, broadening Table 1 MetalθpSemiconductoθDDielectricθo Hg...60–90...Sn (gray)...212AgBr150 Pb...94.5...Ge...366NaCI320 Na.....
For example, it may be used for the study of structural changes arising during various treatments of metals and alloys. In the case of plastically deformed crystals, this method makes it possible to determine the presence of the texture in the sample and during heat treatment to observe phase ...
that as the hydrogen content increases,the Debye temperature decreases,but the lattice parameter of the aUoy increases.The above results experimentally support the decohesion theory that the in- crease of hydrogen in metals will weaken the cohesive force between the atoms and make met- als brittle...
Temperature Dependence of Debye-Waller Factors of Metals The Debye-Waller factors of copper, silver, gold, aluminium, sodium and 伪-iron are computed by using Krebs' model for the lattice dynamics of metals. Blackman's sampling technique has been used for 8000 wave vectors in the first Brillo...
Besides ongoing studies of phase structural transitions, pairing mechanism, and physical properties of recently discovered highly compressed high-temperature superconductor La 3 _3 Ni 2 _2 O 7 δ _{7-\delta} , here we explored a possibility for the electron-phonon pairing mechanism as an origin...
The exponents of the Debye-Waller factor for the cubic metals copper, silver, gold, aluminium, nickel, sodium, chromiun, and α-iron are determined at different temperatures from the vibrational spectrum derived from a model for the lattice dynamics of metals recently propounded by Chéveau, whic...
Temperature dependence of the anharmonic Debye-Waller factor for some cubic metals are calculated by employing our recent dynamical model. Willis anharmonic approach has been followed to estimate the effect of anharmonic terms in the crystal potential. A comparative study of the computed values and ...
Using very high intensity (70 Ci)Ta Moessbauer sources, we have measured the Debye-Waller factors (DWF's) for the (200), (400), and (600) Bragg reflections of three fcc metals (silver, copper, and lead) as a function of temperature from near 80 K to within about 100 K of their ...
Theoretical or Mathematical/ aluminium copper Debye-Waller factors gold lattice dynamics of metallic crystals nickel silver/ FCC metals face centred cubic frequency distribution lattice dynamical model central forces CGW type angular forces volume forces temperature parameter Debye Waller factors Cu Ag Au Ni...