Accession Number:

AD1076418

Title:

Interlaminar Shear Performance of High Temperature Composites

Descriptive Note:

Technical Report,04 Sep 2017,21 Mar 2019

Corporate Author:

AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH WRIGHT-PATTERSON AFB United States

Personal Author(s):

Report Date:

2019-03-01

Pagination or Media Count:

83.0

Abstract:

Interlaminar shear properties of a high temperature polymer matrix composite HTPMC and a ceramic matrix composite CMC were evaluated at elevated temperature. Two variants of the HTPMC AFR-PE-4 were studied one that contained stainless steel foil at the midplane and one variant did not. The interlaminar shear strength ILSS of both variants of the HTPMC was evaluated at 204C in laboratory air. The addition of the stainless steel foil resulted in significant loss of ILSS for the HTPMC. The CMC studied in this work was fabricated via chemical vapor infiltration. The CMC had an oxidation-inhibited matrix consisting of alternating layers of SiC and B4C and was reinforced with Hi-Nicalon fibers. Fiber preforms had pyrolytic carbon coating and boroncarbide overlay. The ILSS of the CMC was measured at 1300C in laboratory air. Additionally, creep performance in interlaminar shear of the CMC was evaluated at 1300C in air and in steam. The creep behavior was assessed for interlaminar shear stresses varying from 12 MPa to 20 MPa in air and in steam. In air and in steam, creep run-out of 100 h was achieved at 13 MPa. Both primary and secondary creep regimes were noted in all tests. Presence of steam had little effect on creep performance. The retained properties of the specimens that attained run-out were characterized.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE