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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Hf-rich melts have a skin effect when Hf-containing cast nickel-base superalloys melt or solidify at temperature range 1250-129O'C. In this interval the interdendritic liquid maintains perfect interconnection and can overflow to surface. It has been proved that Hf content in skin liquid is four times more than its average content in the alloy. The liquid has superior fluidity and wettability, therefore it has a capability of self brazing and a recovery effect on cracks. Using Hf-rich melts as a brazing material has successfully brazed cast superalloy. By means of diffusion treatment, residual Ni5Hf in lapping zone transforms into secondary MC(z). As a result, in lapping zone a reasonable structure like Mar-M200+Hf was obtained. High chemical activity of the skin liquid is a disadvantage. At the surface where the skin liquid contacts shell mold, a thin layer of Hf02 can form. Superalloys 1988 Edited by S. Reichman, D.N. Duhl, G. Maurer, S. Antolovich and C. Lund The Metallurgical Society, 1988

Skin Effect of Hf-Rich Melts and Some Aspects in Its Usage for Hf-Containing Cast Nickel-Base Superalloys