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纳米Al2O3和NiAl共同强化的铁基ODS合金的铝热合成研究

崔跃1,席文君2,王星2,李树杰2

1. 北京航空航天大学 2. 北京航空航天大学材料科学与工程学院

AL2O3 NANOPARTICLE AND NIAL REINFORCED FE-BASED ODS ALLOYS SYNTHESIZED BY THERMITE REACTION

崔跃 席文君 王星 李树杰. 纳米Al2O3和NiAl共同强化的铁基ODS合金的铝热合成研究[J]. 金属学报, DOI: 10.11900/0412.1961.2014.00479.

摘要 相关文章 Metrics 全文: PDF(1651 KB)   摘要: 采用铝热合成法制备了Al2O3和NiAl共同增强的铁基氧化物弥散强化合金（Oxide Dispersion Strengthened alloy）,研究了Al2O3纳米粒子的大小、分布和运动行为。研究表明，添加TiO2凝胶可以形成大小约为10 nm的Al2O3纳米粒子。这些Al2O3纳米粒子由于界面能的作用全部与NiAl相结合。当添加TiO2凝胶质量分数达到1.24%时，合金的拉伸强度达到最大值849 MPa，并保持13%的延伸率。 关键词 ： 纳米Al2O3,  界面能,  拉伸性能,  ODS合金     Abstract：Fe-based oxide dispersion strengthened (ODS) alloys are widely used in advanced aircrafts and gas turbine engines due to their good high temperature strength, creep properties and hot-corrosion resistance. Traditionally, ODS alloys are prepared by internal oxidation and mechanical alloying. However, internal oxidation can not be applied to multi-component alloy. It is difficult to guarantee other elements from being oxidized. On the other hand, the use of mechanical alloying will bring in impurities in the process of ball milling which will compromise the purify of alloy particles surface. In this study, TiO2 xerogel prepared by using sol-gel method was added to the thermite powder mixture and the mixture was then ignited by using a tungsten filament. It solidified rapidly after the molten metal flowed into the bottom of the graphite mold because of the gravity field. It was found that Al2O3 and NiAl were formed in-situ in the molten metal. Therefore Al2O3 nanoparticles and NiAl reinforced Fe-based ODS alloy can be prepared by using this method.The phase composition and morphology of the Fe-based ODS alloy were investigated by using the combination of OM, SEM, TEM, XRD. The size of Al2O3 nanoparticles and the influence of Brownian motion and interface energy on the distribution and movement of the Al2O3 nanoparticles were investigated. The mechanical properties of the Fe-based ODS alloy with different contents of TiO2 xerogel was investigated by using mechanical properties testing machine. The experimental results show that the Fe-based ODS alloy was consisted of ferrite α-FeNiCrAl, NiAl, and Al2O3 nanoparticles. The diameter of Al2O3 nanoparticles was approximately 10 nm. Both Brownian motion and interface energy affect the motion of Al2O3 nanoparticles during the solidification, however, interface energy is dominant. The interface energy between Al2O3 nanoparticles and NiAl was lower than that between Al2O3 and ferrite α-FeNiCrAl. Therefore, nearly all the Al2O3 nanoparticles were connected with the NiAl phase. Higher TiO2 xerogel additions increased the tensile strengthen and elongation of the Fe-based ODS alloy. When the content of TiO2 xerogel was 1.24%, the tensile strength of the Fe-based ODS alloy attained 849MPa and the elongation was 13%. Continuing adding the TiO2 xerogel resulted in the release of large quantities of gas which produced holes in the Fe-based ODS alloy. These holes decreased the mechanical properties of the alloy. 收稿日期: 2014-09-01      基金资助:国家自然科学基金 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 崔跃 席文君 王星 李树杰 44.8K 链接本文: https://www.ams.org.cn/CN/Y0/V0/I0/0 [1] 卫贝贝, 唐斌, 陈晓飞, 张翔, 朱雷, 刘仁慈, 李金山. Ti-(43~45)Al-4Nb-1Mo-0.2B合金轧制过程中显微组织演化及力学响应[J]. 金属学报, 2025, 61(11): 1603-1614. [2] 王子彧, 陈志勇, 王新, 王清江. Ti2AlNb薄板的织构及其对拉伸性能各向异性的影响[J]. 金属学报, 2025, 61(11): 1625-1637. [3] 曹姝婷, 赵剑, 巩桐兆, 张少华, 张健. Cu含量对K4061合金显微组织和拉伸性能的影响[J]. 金属学报, 2024, 60(9): 1179-1188. [4] 张瑶, 齐敏, 孙佳, 吴婷, 马英杰, 王皞, 杨锐. 3D相场模拟研究Ti-6Al-4V合金片层组织形貌的影响因素[J]. 金属学报, 2024, 60(9): 1265-1278. [5] 张楠, 张海武, 王淼辉. 微米级选区激光熔化316L不锈钢的拉伸力学性能[J]. 金属学报, 2024, 60(2): 211-219. [6] 张术钱, 马英杰, 王倩, 齐敏, 黄森森, 雷家峰, 杨锐. 热处理调控 α + β 两相钛合金板材的力学及导电性能[J]. 金属学报, 2024, 60(12): 1622-1636. [7] 王迪, 贺莉丽, 王栋, 王莉, 张思倩, 董加胜, 陈立佳, 张健. Pt-Al涂层对DD413合金高温拉伸性能的影响[J]. 金属学报, 2023, 59(3): 424-434. [8] 孙腾腾, 王洪泽, 吴一, 汪明亮, 王浩伟. 原位自生2%TiB2 颗粒对2024Al增材制造合金组织和力学性能的影响[J]. 金属学报, 2023, 59(1): 169-179. [9] 王硕, 王俊升. Al-Li合金中 δ′/θ′/δ′复合沉淀相结构演化及稳定性的第一性原理探究[J]. 金属学报, 2022, 58(10): 1325-1333. [10] 刘先锋, 刘冬, 刘仁慈, 崔玉友, 杨锐. Ti-43.5Al-4Nb-1Mo-0.1B合金的包套热挤压组织与拉伸性能[J]. 金属学报, 2020, 56(7): 979-987. [11] 余晨帆, 赵聪聪, 张哲峰, 刘伟. 选区激光熔化316L不锈钢的拉伸性能[J]. 金属学报, 2020, 56(5): 683-692. [12] 李源才, 江五贵, 周宇. 纳米孔洞对单晶/多晶Ni复合体拉伸性能的影响[J]. 金属学报, 2020, 56(5): 776-784. [13] 王希,刘仁慈,曹如心,贾清,崔玉友,杨锐. 冷却速率对β凝固γ-TiAl合金硼化物和室温拉伸性能的影响[J]. 金属学报, 2020, 56(2): 203-211. [14] 黎旺,孙倩,江鸿翔,赵九洲. Al-Bi合金凝固过程及微合金化元素Sn的影响[J]. 金属学报, 2019, 55(7): 831-839. [15] 刘征,刘建荣,赵子博,王磊,王清江,杨锐. 电子束快速成形制备TC4合金的组织和拉伸性能分析[J]. 金属学报, 2019, 55(6): 692-700. Viewed Full text Abstract Cited   Shared      Discussed