Development of porous ceramic layers through sublimation of metal phases in multiphase alloys

Nobuaki Sekido; Yoko Mitarai

doi:10.1016/j.ijrmhm.2009.05.005

Development of porous ceramic layers through sublimation of metal phases in multiphase alloys

Nobuaki Sekido, Yoko Mitarai

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Here described is a procedure for the fabrication of porous ceramic layers onto metallic substrates. Porous ceramic layers with submicron sized pores can readily develop by taking advantage of eutectic solidification and sublimation of a metallic phase upon high temperature exposure. The material in the present study is based on the Ir-Y system, where two-phase microstructures comprised of Ir and Ir₃Y are formed through solidification process. A eutectic solidification yields submicron-scaled Ir particles within the Ir₃Y matrix. Upon air-exposure at 1373 K, the Ir phase forms volatile oxides and the Ir₃Y phase transforms into Y₂Ir₂O₇, by which porous ceramic layers develop on the surface of the base materials.

Original language	English
Pages (from-to)	907-911
Number of pages	5
Journal	International Journal of Refractory Metals and Hard Materials
Volume	27
Issue number	5
DOIs	https://doi.org/10.1016/j.ijrmhm.2009.05.005
Publication status	Published - 2009 Sept 1
Externally published	Yes

Keywords

Eutectic solidification
Iridium oxides
Porous oxides
YIrO

ASJC Scopus subject areas

Ceramics and Composites
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.ijrmhm.2009.05.005

Cite this

@article{fbcf69c66079468b9b256918189b17a7,

title = "Development of porous ceramic layers through sublimation of metal phases in multiphase alloys",

abstract = "Here described is a procedure for the fabrication of porous ceramic layers onto metallic substrates. Porous ceramic layers with submicron sized pores can readily develop by taking advantage of eutectic solidification and sublimation of a metallic phase upon high temperature exposure. The material in the present study is based on the Ir-Y system, where two-phase microstructures comprised of Ir and Ir3Y are formed through solidification process. A eutectic solidification yields submicron-scaled Ir particles within the Ir3Y matrix. Upon air-exposure at 1373 K, the Ir phase forms volatile oxides and the Ir3Y phase transforms into Y2Ir2O7, by which porous ceramic layers develop on the surface of the base materials.",

keywords = "Eutectic solidification, Iridium oxides, Porous oxides, YIrO",

author = "Nobuaki Sekido and Yoko Mitarai",

year = "2009",

month = sep,

day = "1",

doi = "10.1016/j.ijrmhm.2009.05.005",

language = "English",

volume = "27",

pages = "907--911",

journal = "International Journal of Refractory Metals and Hard Materials",

issn = "0958-0611",

publisher = "Elsevier BV",

number = "5",

}

TY - JOUR

T1 - Development of porous ceramic layers through sublimation of metal phases in multiphase alloys

AU - Sekido, Nobuaki

AU - Mitarai, Yoko

PY - 2009/9/1

Y1 - 2009/9/1

N2 - Here described is a procedure for the fabrication of porous ceramic layers onto metallic substrates. Porous ceramic layers with submicron sized pores can readily develop by taking advantage of eutectic solidification and sublimation of a metallic phase upon high temperature exposure. The material in the present study is based on the Ir-Y system, where two-phase microstructures comprised of Ir and Ir3Y are formed through solidification process. A eutectic solidification yields submicron-scaled Ir particles within the Ir3Y matrix. Upon air-exposure at 1373 K, the Ir phase forms volatile oxides and the Ir3Y phase transforms into Y2Ir2O7, by which porous ceramic layers develop on the surface of the base materials.

AB - Here described is a procedure for the fabrication of porous ceramic layers onto metallic substrates. Porous ceramic layers with submicron sized pores can readily develop by taking advantage of eutectic solidification and sublimation of a metallic phase upon high temperature exposure. The material in the present study is based on the Ir-Y system, where two-phase microstructures comprised of Ir and Ir3Y are formed through solidification process. A eutectic solidification yields submicron-scaled Ir particles within the Ir3Y matrix. Upon air-exposure at 1373 K, the Ir phase forms volatile oxides and the Ir3Y phase transforms into Y2Ir2O7, by which porous ceramic layers develop on the surface of the base materials.

KW - Eutectic solidification

KW - Iridium oxides

KW - Porous oxides

KW - YIrO

UR - http://www.scopus.com/inward/record.url?scp=67649589184&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67649589184&partnerID=8YFLogxK

U2 - 10.1016/j.ijrmhm.2009.05.005

DO - 10.1016/j.ijrmhm.2009.05.005

M3 - Article

AN - SCOPUS:67649589184

SN - 0958-0611

VL - 27

SP - 907

EP - 911

JO - International Journal of Refractory Metals and Hard Materials

JF - International Journal of Refractory Metals and Hard Materials

IS - 5

ER -

Development of porous ceramic layers through sublimation of metal phases in multiphase alloys

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this