diff options
Diffstat (limited to 'Materials_science_and_engineering_an_introduction/CH10.ipynb')
| -rw-r--r-- | Materials_science_and_engineering_an_introduction/CH10.ipynb | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/Materials_science_and_engineering_an_introduction/CH10.ipynb b/Materials_science_and_engineering_an_introduction/CH10.ipynb index 2a7a789c..b7fb2351 100644 --- a/Materials_science_and_engineering_an_introduction/CH10.ipynb +++ b/Materials_science_and_engineering_an_introduction/CH10.ipynb @@ -27,27 +27,21 @@ "cell_type": "code",
"collapsed": false,
"input": [
- "#(a)Computation of Critical Nuclear Radius\n",
"\n",
- "#Given\n",
"Hf=-1.16*10**9 # in J/m**3 latent heat of fusion\n",
"Y=0.132 # in J/m**2 Surface energy\n",
"Tm=1064.0+273.0 # in K Melting point of gold\n",
"\n",
- "#calculation\n",
"import math\n",
"T=Tm-230.0 # in K 230 is supercooling value\n",
"r=-2*Y*Tm/(Hf*(Tm-T))\n",
"G=16*math.pi*Y**3*Tm**2/(3*Hf**2*(Tm-T)**2)\n",
"\n",
- "#part (b)\n",
"a=0.413*10**-9 # in m Unit Cell edge length\n",
- "#unit cells per paticle\n",
"u_c=4*math.pi*r**3/(3*a**3)\n",
"n=4 #In FCC . no of atoms in per unit cell\n",
"U_c=int(u_c)*n\n",
"\n",
- "#Result\n",
"print\"(a)Critical Radius is \",round(r/10**-9,2),\"nm\"\n",
"print\"Activation free energy is \",round(G,21),\"J\"\n",
"print\"(b)Total no. of atoms per critical nucleus are \",U_c\n",
@@ -80,19 +74,15 @@ "cell_type": "code",
"collapsed": false,
"input": [
- "#Determination the rate of recrystallization\n",
"\n",
- "#Given\n",
"n=5.0\n",
"y=0.3\n",
"t=100.0 #in min\n",
"\n",
- "#Calculation\n",
"k=-math.log(1-y)/t**n\n",
"thalf=(-math.log(1-0.5)/k)**(1/n)\n",
"rate=1/thalf\n",
"\n",
- "#Result\n",
"print\"Rate is \",rate,\"min**-1\"\n",
"\n"
],
|