کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
808770 1468338 2008 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electron cloud overlap related to specific energy threshold and breakdown at high temperature, short time and nano distance
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Electron cloud overlap related to specific energy threshold and breakdown at high temperature, short time and nano distance
چکیده انگلیسی

An electron cloud overlap model is developed to reflect the integrity of the electron arrangements for a system with two adjoining atoms excited by high temperature. This is accomplished with the aid of an anticipated specific energy threshold breakdown transitional region that spanned approximately one-half order of magnitude in the absolute temperature. Moderate overlap is assumed such that the interference from the neighboring atoms will not seriously affect the electron behavior of the single atom. The threshold breakdown phenomenon and the accompanying transition of the specific energy are found to prevail for the fictitious stress and strain within the respective ranges of 10−13 to 10−17 N/m2 and 10−2 to 10−6 m/m. They are identified from the relation r3T/t=(h3/8π2kme2)(1/rb(n)) with me, h and k   being, respectively, the mass of electron, Planck’s and Boltzmann’s constant. The Bohr radius is rb(n) where n = 1,2, …, 7 stand for the quantum number. Note that r, t and T are the distance, time and absolute temperature associated with a rapidly accelerating electron. The specific energy threshold is physically comparable to the integrity of the atomic arrangement.Discussed are the integrity threshold and break down domain of r–T–φ with φ being the trade-off ratio of the fictitious mechanical energy to that of the thermal energy. Effects of the atomic arrangement on the specific energy threshold and breakdown are reflected by the electron cloud overlap parameter m, the precise physical interpretation of which will not be known until more information is gained on the behavior of subatomic particles. What the electron cloud model does reveal is that the origin of damage initiation may well start from the mis-arrangement of electrons when excited by high temperature.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theoretical and Applied Fracture Mechanics - Volume 50, Issue 3, December 2008, Pages 173–183
نویسندگان
,