EXAM3-2008key - EXAM III INTRODUCTION TO MATERIALS SCIENCE...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
EXAM III INTRODUCTION TO MATERIALS SCIENCE - MSE 150 SPRING 2008 HONOR CODE I PLEDGE MY HONOR THAT I HAVE NEITHER GIVEN OR RECEIVED AID ON THIS EXAMINATION. SIGNATURE _________________________ PRINT NAME _________________________ CAST YOUR VOTE TO DECIDE WHETHER THERE WILL BE A BONUS QUIZ ON MONDAY, APRIL 21, 2008 YES ______ NO ______ DO NOT TURN THIS PAGE UNTIL 10:10 AM YOU HAVE 50 MINUTES TO COMPLETE THIS EXAM 1
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
(10 points) Solid-state diffusion can be described by Fick’s First Law. What are the names and SI units for the following terms in Fick’s First Law? J D Diffusivity or Diffusion coefficient (m 2 /s) dC/dx Concentration gradient (atoms/m 3 *1/m) What is the thermodynamical driving force for diffusion? Concentration gradient (entropy is increasing) Fick’s Second Law is a second order differential equation. What diffusion condition does Fick’s Second Law describe (i.e., what is the term dC x /dt?)? Non-Steady State Thermal activated processes are exponential functions of temperature that can be described by the following equation: Rate of reaction = C e -Q/RT What is the name of this type of equation? Arrhenius What does the term Q represent? Activation Energy (4 points) For nucleation of a solid from the liquid: What is the thermodynamic driving force? Volume free energy What is the thermodynamic retarding force? Surface energy What is the name for nucleation that occurs on the surface of a container or on insoluble impurities? Heterogeneous How does undercooling below T m influence the size of a critical nucleus (r*)? r* decreases (12 points) The schematic diagram shows a NMOS field effect transistor. 2
Image of page 2
What do the letters MOS stand for?
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern