Pt-20Rh dispersion strengthened by ZrO2 - Microstructure and strength

Faping Hu, Tianbo Yu, Weiting Liu, Yan Yang, Guobing Wei, Xuan Luo, Huiyi Tang, Niels Hansen, Xiaoxu Huang, Weidong Xie

Research output: Contribution to journalJournal articleResearchpeer-review

1 Downloads (Pure)

Abstract

Pt-20Rh dispersion strengthened by ZrO2 particles in different volume fractions has been produced by consolidation of milled powder which has been internally oxidized. The microstructure has been characterized by scanning electron microscopy, electron backscatter diffraction, and transmission electron microscopy; tensile properties have been determined at RT and 1000 °C. The Pt-20Rh matrix is subdivided on the submicrometer scale by low angle dislocation boundaries and high angle boundaries. ZrO2 particles with sizes in the range 5–35 nm are uniformly distributed and with increasing volume fraction the flow stress increases and at 0.9% it is doubled both at RT and at 1000 °C. Based on the superposition of particle and matrix strengthening, the flow stress has been calculated and good accord has been found with experiment both at RT and 1000 °C.
Original languageEnglish
Article number138305
JournalMaterials Science and Engineering A
Volume765
Number of pages8
ISSN0921-5093
DOIs
Publication statusPublished - 2019

Bibliographical note

GA no. 788567

Keywords

  • Pt
  • ZrO2
  • Dispersion strengthening
  • Orowan stress
  • Internal oxidation-powder metallurgy

Cite this

Hu, Faping ; Yu, Tianbo ; Liu, Weiting ; Yang, Yan ; Wei, Guobing ; Luo, Xuan ; Tang, Huiyi ; Hansen, Niels ; Huang, Xiaoxu ; Xie, Weidong. / Pt-20Rh dispersion strengthened by ZrO2 - Microstructure and strength. In: Materials Science and Engineering A. 2019 ; Vol. 765.
@article{018bbbdc123d4427b33172415732696b,
title = "Pt-20Rh dispersion strengthened by ZrO2 - Microstructure and strength",
abstract = "Pt-20Rh dispersion strengthened by ZrO2 particles in different volume fractions has been produced by consolidation of milled powder which has been internally oxidized. The microstructure has been characterized by scanning electron microscopy, electron backscatter diffraction, and transmission electron microscopy; tensile properties have been determined at RT and 1000 °C. The Pt-20Rh matrix is subdivided on the submicrometer scale by low angle dislocation boundaries and high angle boundaries. ZrO2 particles with sizes in the range 5–35 nm are uniformly distributed and with increasing volume fraction the flow stress increases and at 0.9{\%} it is doubled both at RT and at 1000 °C. Based on the superposition of particle and matrix strengthening, the flow stress has been calculated and good accord has been found with experiment both at RT and 1000 °C.",
keywords = "Pt, ZrO2, Dispersion strengthening, Orowan stress, Internal oxidation-powder metallurgy",
author = "Faping Hu and Tianbo Yu and Weiting Liu and Yan Yang and Guobing Wei and Xuan Luo and Huiyi Tang and Niels Hansen and Xiaoxu Huang and Weidong Xie",
note = "GA no. 788567",
year = "2019",
doi = "10.1016/j.msea.2019.138305",
language = "English",
volume = "765",
journal = "Materials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier",

}

Pt-20Rh dispersion strengthened by ZrO2 - Microstructure and strength. / Hu, Faping; Yu, Tianbo; Liu, Weiting; Yang, Yan; Wei, Guobing; Luo, Xuan; Tang, Huiyi; Hansen, Niels; Huang, Xiaoxu; Xie, Weidong.

In: Materials Science and Engineering A, Vol. 765, 138305, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Pt-20Rh dispersion strengthened by ZrO2 - Microstructure and strength

AU - Hu, Faping

AU - Yu, Tianbo

AU - Liu, Weiting

AU - Yang, Yan

AU - Wei, Guobing

AU - Luo, Xuan

AU - Tang, Huiyi

AU - Hansen, Niels

AU - Huang, Xiaoxu

AU - Xie, Weidong

N1 - GA no. 788567

PY - 2019

Y1 - 2019

N2 - Pt-20Rh dispersion strengthened by ZrO2 particles in different volume fractions has been produced by consolidation of milled powder which has been internally oxidized. The microstructure has been characterized by scanning electron microscopy, electron backscatter diffraction, and transmission electron microscopy; tensile properties have been determined at RT and 1000 °C. The Pt-20Rh matrix is subdivided on the submicrometer scale by low angle dislocation boundaries and high angle boundaries. ZrO2 particles with sizes in the range 5–35 nm are uniformly distributed and with increasing volume fraction the flow stress increases and at 0.9% it is doubled both at RT and at 1000 °C. Based on the superposition of particle and matrix strengthening, the flow stress has been calculated and good accord has been found with experiment both at RT and 1000 °C.

AB - Pt-20Rh dispersion strengthened by ZrO2 particles in different volume fractions has been produced by consolidation of milled powder which has been internally oxidized. The microstructure has been characterized by scanning electron microscopy, electron backscatter diffraction, and transmission electron microscopy; tensile properties have been determined at RT and 1000 °C. The Pt-20Rh matrix is subdivided on the submicrometer scale by low angle dislocation boundaries and high angle boundaries. ZrO2 particles with sizes in the range 5–35 nm are uniformly distributed and with increasing volume fraction the flow stress increases and at 0.9% it is doubled both at RT and at 1000 °C. Based on the superposition of particle and matrix strengthening, the flow stress has been calculated and good accord has been found with experiment both at RT and 1000 °C.

KW - Pt

KW - ZrO2

KW - Dispersion strengthening

KW - Orowan stress

KW - Internal oxidation-powder metallurgy

U2 - 10.1016/j.msea.2019.138305

DO - 10.1016/j.msea.2019.138305

M3 - Journal article

VL - 765

JO - Materials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing

JF - Materials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

M1 - 138305

ER -