Improvement of oxidation resistance of a Mo-62Si-5B (at.%) alloy at 1250 °C and 1350 °C via an in situ pre-formed SiO2 fabricated by spark plasma sintering
Source abstract
Abstract
Abstract A Mo-Si-B-O alloy was obtained by spark plasma sintering (SPS) using fine Mo-62Si-5B (at.%) alloy powder (with a D 50 size of 2.21 μm). The SPS Mo-Si-B-O pseudo alloy consisted of fine MoSi 2 /Mo 5 Si 3 /MoB/SiO 2 microstructure and showed better oxidation resistance than the coarsened microstructure. The SiO 2 that was pre-formed during SPS and the fine microstructure reduced the incubation stage of formation of continuously protective borosilicate layer, which is beneficial to the oxidation resistance. A “Mechanical locking” mechanism for the borosilicate layer by spilling of the pre-formed SiO 2 decreased cracks in the borosilicate-substrate interface, increased interface strength and integrity of the borosilicate layer.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced materials and composites · Intermetallics and Advanced Alloy Properties · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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