Characterization of structure and mechanical properties of MoSi{sub 2}-SiC nanolayer composites

Thumbnail image of item number 1 in: 'Characterization of structure and mechanical properties of MoSi{sub 2}-SiC nanolayer composites'.
Thumbnail image of item number 2 in: 'Characterization of structure and mechanical properties of MoSi{sub 2}-SiC nanolayer composites'.
Thumbnail image of item number 3 in: 'Characterization of structure and mechanical properties of MoSi{sub 2}-SiC nanolayer composites'.
Thumbnail image of item number 4 in: 'Characterization of structure and mechanical properties of MoSi{sub 2}-SiC nanolayer composites'.
Showing 1-4 of 13 pages in this article.

PDF Version Also Available for Download.

Description

A systematic study of structure-mechanical properties relation is reported for MoSi{sub 2}-SiC nanolayer composites. Alternating layers of MoSi{sub 2} and SiC were synthesized by DC magnetron and rf-diode sputtering, respectively. Cross-sectional transmission electron microscopy was used to examine three distinct reactions in the specimens when exposed to different annealing conditions: Crystallization and phase transformation of MoSi{sub 2}, crystallization of SiC, and spheroidization of the layer structures. Nanoindentation was employed to characterize the mechanical response as a function of structural changes. As-sputtered material exhibits amorphous structures in both types of layers and has a hardness of 11 GPa and a modulus … continued below

Physical Description

9 p.

Creation Information

Kung, H.; Jervis, T. R.; Nastasi, M.; Mitchell, T. E. & Hirvonen, J. P. December 31, 1993.

Context

This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

Who

People and organizations associated with either the creation of this article or its content.

Authors

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

About | Browse this Partner

Contact Us

Corrections Questions

What

Descriptive information to help identify this article. Follow the links below to find similar items on the Digital Library.

Description

A systematic study of structure-mechanical properties relation is reported for MoSi{sub 2}-SiC nanolayer composites. Alternating layers of MoSi{sub 2} and SiC were synthesized by DC magnetron and rf-diode sputtering, respectively. Cross-sectional transmission electron microscopy was used to examine three distinct reactions in the specimens when exposed to different annealing conditions: Crystallization and phase transformation of MoSi{sub 2}, crystallization of SiC, and spheroidization of the layer structures. Nanoindentation was employed to characterize the mechanical response as a function of structural changes. As-sputtered material exhibits amorphous structures in both types of layers and has a hardness of 11 GPa and a modulus of 217GPa. Subsequent heat treatment induces crystallization of MoSi{sub 2} to form the C40 structure at 500C and SiC to form the a structure at 700C. The crystallization process is directly responsible for hardness and modulus increase in multilayers. A hardness of 24GPa and a modulus of 340GPa can be achieved through crystallizing both MoSi{sub 2} and SiC layers. Annealing at 900C for 2h causes the transformation of MoSi{sub 2} into the C11{sub b} structure, as well as spheroidization of the layering to form a nanocrystaulline equiaxed microstructure. A slight degradation in hardness but not in modulus is observed accompanying the layer break-down.

Physical Description

9 p.

Notes

OSTI as DE94004982; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

Source

  • Fall meeting of the Materials Research Society (MRS),Boston, MA (United States),29 Nov - 3 Dec 1993

Language

Item Type

Identifier

Unique identifying numbers for this article in the Digital Library or other systems.

  • Other: DE94004982
  • Report No.: LA-UR--93-4274
  • Report No.: CONF-931108--33
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 10112648
  • Archival Resource Key: ark:/67531/metadc1275641

Collections

This article is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

About | Browse this Collection

What responsibilities do I have when using this article?

Digital Files

When

Dates and time periods associated with this article.

Creation Date

  • December 31, 1993

Added to The UNT Digital Library

  • Oct. 12, 2018, 6:44 a.m.

Description Last Updated

  • Nov. 13, 2018, 1:01 p.m.

Usage Statistics

When was this article last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 9
More Statistics

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

Thumbnail image of item number 1 in: 'Characterization of structure and mechanical properties of MoSi{sub 2}-SiC nanolayer composites'.
Thumbnail image of item number 2 in: 'Characterization of structure and mechanical properties of MoSi{sub 2}-SiC nanolayer composites'.
Thumbnail image of item number 3 in: 'Characterization of structure and mechanical properties of MoSi{sub 2}-SiC nanolayer composites'.
Thumbnail image of item number 4 in: 'Characterization of structure and mechanical properties of MoSi{sub 2}-SiC nanolayer composites'.

PDF Version Also Available for Download.

Citations, Rights, Re-Use

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Links for Robots

Helpful links in machine-readable formats.

Archival Resource Key (ARK)

International Image Interoperability Framework (IIIF)

Metadata Formats

Images

URLs

Stats

Kung, H.; Jervis, T. R.; Nastasi, M.; Mitchell, T. E. & Hirvonen, J. P. Characterization of structure and mechanical properties of MoSi{sub 2}-SiC nanolayer composites, article, December 31, 1993; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1275641/: accessed May 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

Back to Top of Screen