A novel nano-structured zirconium alloy prospective for high temperature applications
Source abstract
Abstract
Zirconium alloys have many advantages for structural applications in nuclear reactors, but their use has been generally restricted at temperatures below 400 °C. In this study, a novel nano-structured Zr alloy was successfully fabricated by ball milling and hot-isostatic-pressing, using Zr, Sn, ZrH 2 and nano-Y 2O 3 as raw powders. The alloy microstructure was characterized to be uniquely featured with a very fine grain structure (mean size: ∼3 μm) and a high number density of highly-coherent, ultra-fine nano-precipitates (mean size: 4.2 nm, density: ∼2.52×10 23 m −3). These nano-precipitates were identified as Y 2Zr 2O 7, with the interfacial orientation relation of 001 ( 010 ) Y 2 Zr 2 O 7 // 0001 2 1 ̅ 1 ̅ 0 Zr . This new alloy achieved remarkably-improved strength and heat resistance from room temperature up to 600 °C for at least 1000 h, which is superior to all the current commercial Zr alloys, especially to Zr-2 and Zr-4 alloys with a more comparable matrix composition.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nuclear Materials and Properties · Fusion materials and technologies · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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