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TA2表面等離子滲鈮合金層在700~900 ℃的氧化行為
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國(guó)家自然科學(xué)基金 (51071106)；山西省自然科學(xué)基金 (2011011020-3, 2012011021-4)


Oxidation Behavior of Surface Plasma Niobium Alloying Layer on TA2 at 700~900 oC
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    摘要:

    采用雙輝技術(shù)在TA2基體表面滲入鈮形成結(jié)構(gòu)致密、與基體形成冶金結(jié)合的鈦鈮合金層。結(jié)合XRD、SEM及EDS等手段分析滲鈮和未滲鈮TA2試樣分別在700、800、900 ℃的高溫氧化行為。實(shí)驗(yàn)結(jié)果表明：隨著氧化溫度的提高，氧化增重增加，滲鈮比未滲鈮的氧化增重降低，抗高溫氧化性能改善，特別在900 ℃鈮的作用明顯；對(duì)滲鈮和未滲鈮TA2在900 ℃分別氧化20、40、100 h后氧化層的表面及截面進(jìn)行分析，獲得對(duì)合金層成分、結(jié)構(gòu)、氧化性能之間關(guān)系的認(rèn)識(shí)。鈦鈮合金層高溫氧化后的氧化層是由三部分組成：外層是由高濃度合金層氧化而形成，其氧化產(chǎn)物主要是Nb2O5/TiO2，中間層主要由TiO2/TiO和Nb2O5組成，內(nèi)層是分布著條狀的富鈮相

    Abstract:

    The high temperature oxidation of Ti-Nb alloy layer prepared by a double-glow technique was investigated. The oxidation behavior of treated TA2 was analyzed at 700, 800 and 900 oC for 100 h in air by mean of XRD, SEM and EDS. The results show that the oxidation behavior of TA2 at 700~900 oC for 100 h is improved after niobium alloying process and the effect is more pronounced at 900 oC. Cross-section morphology and composition of the treated TA2 after subjecting to oxidation for 20, 40 and 100 h at 900 oC were characterized using SEM and EDS. The upper layer is composed of the mixed oxides (Nb2O5/TiO2), which are formed by the oxidation product of high concentration niobium alloyed layer; TiO2/TiO/Nb2O5 exist in a compact intermediate layer, and the inner layer are distributed with white stripe phase rich in niobium

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王文波,賀志勇,王振霞,劉小平,徐 重. TA2表面等離子滲鈮合金層在700~900 ℃的氧化行為[J].稀有金屬材料與工程,2014,43(5):1105~1110.[Wang Wenbo, He Zhiyong, Wang Zhenxia, Liu Xiaoping, Xu Zhong. Oxidation Behavior of Surface Plasma Niobium Alloying Layer on TA2 at 700~900 oC[J]. Rare Metal Materials and Engineering,2014,43(5):1105~1110.]
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  • 收稿日期:2013-05-29
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  • 在線發(fā)布日期: 2014-10-13
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