- #1
tresgog
- 4
- 0
Hello,
I'm studying for a project a rectangular-cross sectionned suspended silicon nanowire.
My question is very simple: at which current will my nanowire break?
The melting point is 1687K and I start at 300K
I don't really know where to start since the resistance, the thermal conductivity and many physical depend upon the temperature and my temperature range is wide.
I've tried the following:
Provided that the heat of fusion of Silicon is: 50.6kJ.mol-1
I have the heat generated by the electrical power = R*I*I*t
R=electrical resistance
I=current
t=time
I must match the heat generated by the electrical power and heat of fusion
(Heat of fusion)*(Volume*density/molar mass)=R*I*I*t
And I can have my current I
However this model is stupid because I don't take to account the dissipation by convection, conduction and scattering.
how to do it properly?
I'm studying for a project a rectangular-cross sectionned suspended silicon nanowire.
My question is very simple: at which current will my nanowire break?
The melting point is 1687K and I start at 300K
I don't really know where to start since the resistance, the thermal conductivity and many physical depend upon the temperature and my temperature range is wide.
I've tried the following:
Provided that the heat of fusion of Silicon is: 50.6kJ.mol-1
I have the heat generated by the electrical power = R*I*I*t
R=electrical resistance
I=current
t=time
I must match the heat generated by the electrical power and heat of fusion
(Heat of fusion)*(Volume*density/molar mass)=R*I*I*t
And I can have my current I
However this model is stupid because I don't take to account the dissipation by convection, conduction and scattering.
how to do it properly?