元素Ta對Ti-60A鈦合金抗氧化性能的影響
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時(shí)間：2016-01-07
對不同Ta含量的Ti-60A合金在700、750和800 ℃時(shí)的高溫氧化行為進(jìn)行測試，并運(yùn)用X射線、掃描電鏡等對Ta的作用進(jìn)行分析和討論。
元素Ta對Ti-60A鈦合金抗氧化性能的影響Effect of Ta on oxidation resistance behavior of?Ti-60A titanium alloys對不同Ta含量的Ti-60A合金在700、750和800 ℃時(shí)的高溫氧化行為進(jìn)行測試，并運(yùn)用X射線、掃描電鏡等對Ta的作用進(jìn)行分析和討論。結(jié)果表明：Ta的加入顯著改善合金的高溫抗氧化性能，主要表現(xiàn)為Ta促使合金表層氧化物更致密細(xì)小，減小氧化膜的厚度，增加氧化膜與基體界面的粘附性，提高表面的穩(wěn)定性；隨Ta含量的增加，Ti-60A合金的氧化速率逐漸降低；Ti-60A合金的氧化動(dòng)力學(xué)服從線性規(guī)律，在700和750 ℃氧化時(shí)，氧化近似為拋物線型規(guī)律；在800 ℃時(shí)，氧化近似服從直線規(guī)律。
The effects of alloying element Ta on high temperature oxidation resistance of near-alpha high temperature titanium alloy Ti-60A were investigated. The high temperature oxidation behaviors of Ti-60A alloy with different Ta contents were tested by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The results show that the addition of Ta can improve the oxidation resistance of the alloy. The improvement of oxidation resistance by Ta is mainly attributed to promote the formation of homogeneous and fine oxidation products on the surface, increase the adhesion between the oxide scale and the matrix alloys, and improve the surface stability of alloys. The oxidation kinetics of the alloys can be described as a parabolic law at 700 and 750 ℃ and a linear law at 800 ℃. In addition, the more the Ta content of the alloy is, the lower the oxidation rate is.
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