Shaping Si, NiCo, and glass substrates via stresses in the coatings

Xiaoli Wang, Youwei Yao, Shi Ye, Tianchen Liu, Lahsen Assoufid, Jian Cao, M. P. Ulmer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations


Here we report progress toward the fabrication of adaptive or active Si X-ray mirrors via a two step process. The first step is to curve a Si flat and then coat it with Terfenol-D that will allow the shape control via the application of a magnetic field. The goal is to create a mirror whose local (a few mm-length scale) slope can be changed and left for several hours or more. The current work described here was done in on Si to demonstrate the ability to produce the initial curvature, and in parallel, work to on magnetically hard NiCo 5 cm x 5 cm square plus on a glass sample. The glass sample was used a proto-type to model making changes in two different locations on a mirror. The NiCo sample was used to show that a magnetic field can be retained in a magnetically hard substrate such that the magnetically induced stress in the Terfenol-D was able to maintain a deformation for as long as time permitted to make the measurement which was 71 hours.

Original languageEnglish (US)
Title of host publicationAdaptive X-Ray Optics IV
EditorsStephen L. O'Dell, Ali M. Khounsary
ISBN (Electronic)9781510603219
StatePublished - 2016
EventAdaptive X-Ray Optics IV - San Diego, United States
Duration: Aug 28 2016Aug 29 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherAdaptive X-Ray Optics IV
Country/TerritoryUnited States
CitySan Diego


  • X-ray optics
  • active or adaptive optics
  • coating processes
  • magnetic smart materials

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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