English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

This study examined the relationship between the lamellar-forming grain boundary reaction and the change in hardness during the aging process of an Au-Pt-based metal-ceramic alloy composed of 76.6 Au–9.9 Pt–9.3 Pd–1.7 In–1.2 Ag–0.56 Sn (wt%) with minor ingredients. The phase decomposition of the parent Au-rich α phase occurred within a very short time (30 s) by aging at 550 °C after a solution-treatment at 950 °C due to the solubility limits of Au and Pt in each other, which initiated a lamellar-forming grain boundary reaction. The observed hardening was attributed to both the grain interior and grain boundary precipitate. On the other hand, the grain boundary precipitate comprising the fine lamellar structure caused more powerful hardening from the early stage of the aging process. The alternate layer of the grain boundary lamellar structure was composed of Pt-, In- and Sn-depleted Au-rich α1 phase as well as precipitated Pt-, In- and Sn-concentrated β1 phase. The extremely fine nature of the grain boundary lamellar structure supplied large amounts of inter-phase boundaries, which contained lattice strain by the difference in the lattice parameter between the α1 and β1 phases, resulting in hardening.

Lamellar-forming grain boundary reaction related to age-hardening mechanism in an Au-Pt-Pd-In metal-ceramic alloy