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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

MAX phases have great potential under demands of both high-temperature andhigh-stress performance, with their mixed atomic bonding producing thetemperature and oxidation resistance of ceramics with the mechanical resilienceof metals. Here, we measure the mechanical properties up to 980C bynanoindentation on highly dense and pure Cr$_2$AlC, as well as after oxidationwith a burner rig at 1200C for more than 29 hours. Only modest reductions inboth hardness and modulus up to 980C were observed, implying no change indeformation mechanism. Furthermore, micro-cantilever fracture tests werecarried out at the Cr$_2$AlC/Cr$_7$C$_3$ and Cr$_7$C$_3$/Al$_2$O$_3$ interfacesafter the oxidation of the Cr$_2$AlC substrates with said burner rig. Thevalues are typical of ceramic-ceramic interfaces, below 4 MPa/m, leading to thehypothesis that the excellent macroscopic behaviour is due to a combination oflow internal strain due to the match in thermal expansion coefficient as wellas the convoluted interface.

Mechanical Characterisation of the Protective Al$_2$O$_3$ Scale in Cr$_2$AlC MAX phases