Virgil Optasanu, Benjamin Vincent, Pascal Berger, María del Carmen Marco de Lucas, Tony Montesin, Luc Lavisse
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引用次数: 0
Abstract
The addition of Si is known to improve the oxidation resistance of pure titanium and titanium alloys. However, most past studies concern the influence of relatively large Si contents (0.35–8 wt%), which is often incompatible with a good ductility because of the presence of Ti5Si3 precipitates. This study focuses on the influence of the Si content on the high-temperature resistance of near-alpha alloys from the family of Ti6244 alloy (6% Al, 2% Sn, 4% Zr 4% Mo–wt%) with small proportions of Si. The silicon addition was found to improve the high-temperature oxidation resistance of near-alpha Ti-Al-Sn-Zr-Mo family alloys by decreasing the oxidation rate and the oxide scale thickness, as well by producing a denser oxide scale. Rutile and alumina were detected within the oxide scale by XRD and Raman spectrometry. The presence of Si is associated with the presence of larger quantities of N at the oxide/metal interface.
众所周知，添加 Si 可以提高纯钛和钛合金的抗氧化性。然而，过去的大多数研究都涉及相对较高的 Si 含量（0.35-8 wt%）的影响，由于 Ti5Si3 沉淀的存在，这通常与良好的延展性不相容。本研究的重点是 Si 含量对 Ti6244 合金（6% Al、2% Sn、4% Zr、4% Mo-wt%）家族中含有少量 Si 的近α合金耐高温性能的影响。通过降低氧化率和氧化鳞片厚度以及产生更致密的氧化鳞片，发现硅的添加可改善近α系 Ti-Al-Sn-Zr-Mo 合金的高温抗氧化性。通过 XRD 和拉曼光谱，在氧化鳞片中检测到了金红石和氧化铝。硅的存在与氧化物/金属界面上大量 N 的存在有关。
期刊介绍：
Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.
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