Instructors: Peter Loos office: ME 215, ext. 3698, ploos@YouKnowWhere mobile: 281-250-4998
and perhaps one graduate student teaching assistant
Schedule & Location: Tentatively Tue. or Thu. Most of the equipment is in SS B06 (basement) and one machine is in GL 330.
Text: Elements of X-ray Diffraction, either 3rd ed. or 2nd edition
Grading: Based on attendance, participation, safety, ability to operate the equipment and neatness in lab as well as completeness, correctness, organization and clarity of expression in the lab reports. Students whose efforts during the semester are unsatisfactory will have the opportunity to take a final exam for extra credit.
Safety: There will be a quiz about x-ray safety. Each student will take it as many times as required to get all the answers correct.
Experiments: There will be seven lab experiments, accompanied by reading in the text and in other references.
#1 Instrument calibration, the emission spectrum of the Cu x-ray tube, filtering the spectrum.
#2 Measurement of Pt and Ti film thickness and stress using (a) Scherrer's formula and a
Williamson-Hall plot and (b) x-ray reflectometry (XRR) methods.
#3 Identification of unknown powder samples using Jade and the PDF. Determine Bravais
lattice and lattice parameter by the spreadsheet method.
#4 Lattice parameter measurement and stoichiometry in alloys using Vegard's Law.
#5 Determination of volume fractions of multiple phases in a mixture using reference intensity ratios.
#6 Measurement of residual elastic stresses in a simple structure using the sine squared psi method.
#7 To be determined, probably use of pole figures or in-plane (grazing incidence) diffraction for evaluating preferred orientation.
Depending on student interest, availability of suitable sample materials, etc. there is a possibility of doing a small angle x-ray scattering (SAXS) measurement in experiment #7.
X-ray Instrumentation: An old Siemens diffractometer
will be used in experiment #1. Two modern Rigaku
Dmax machines will be used in experiments #2 -
#5. A state-of-the-art Rigaku SmartLab machine (first of its kind in the
Lab Reports: Students will work together in small groups when operating the equipment and collecting & analyzing data; however, students must work independently to write up the lab reports. Lab reports are due three weeks after the data are collected. Points will be deducted for late reports.
Computation: Students will use Jade software and the ICDD Powder Diffraction File (PDF) database. Four copies of this software are running on WinXP machines in SS B06. Also, CaRIne software for calculating diffraction patterns and visualizing crystal structure is available in SS B06. Spreadsheet software will also be used.
NOTICE: Any student with a disability requiring accommodations in
this class is encouraged to contact Instructor after class or during office
hours. Additionally, students should contact the Disabled Student
Services office in the