A general process for in situ formation of functional surface layers on ceramics

Toshihiro Ishikawa (), Hiroyuki Yamaoka, Yoshikatsu Harada, Teruaki Fujii and Toshio Nagasawa
Additional contact information
Toshihiro Ishikawa: Ube Research Laboratory, Corporate Research & Development, Ube Industries Ltd
Hiroyuki Yamaoka: Ube Research Laboratory, Corporate Research & Development, Ube Industries Ltd
Yoshikatsu Harada: Ube Research Laboratory, Corporate Research & Development, Ube Industries Ltd
Teruaki Fujii: Ube Research Laboratory, Corporate Research & Development, Ube Industries Ltd
Toshio Nagasawa: Ube Research Laboratory, Corporate Research & Development, Ube Industries Ltd

Nature, 2002, vol. 416, issue 6876, 64-67

Abstract: Abstract Ceramics are often prepared with surface layers of different composition from the bulk1,2, in order to impart a specific functionality to the surface or to act as a protective layer for the bulk material3,4. Here we describe a general process by which functional surface layers with a nanometre-scale compositional gradient can be readily formed during the production of bulk ceramic components. The basis of our approach is to incorporate selected low-molecular-mass additives into either the precursor polymer from which the ceramic forms, or the binder polymer used to prepare bulk components from ceramic powders. Thermal treatment of the resulting bodies leads to controlled phase separation (‘bleed out’) of the additives, analogous to the normally undesirable outward loss of low-molecular-mass components from some plastics5,6,7,8,9; subsequent calcination stabilizes the compositionally changed surface region, generating a functional surface layer. This approach is applicable to a wide range of materials and morphologies, and should find use in catalysts, composites and environmental barrier coatings.

Date: 2002
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/416064a Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:416:y:2002:i:6876:d:10.1038_416064a

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/416064a

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().