Nano-Ti5Si3 leading to enhancement of oxidation resistance
Nano-Ti5Si3 leading to enhancement of oxidation resistance
复制标题
纳米Ti5Si3增强抗氧化能力
DOI：
10.1016/j.corsci.2018.05.043
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发表时间：
2018
影响因子：
8.3
通讯作者：
Yue S
中科院分区：
文献类型：
--
作者：
Jiao Y;Huang L J;Wei S L;Geng L;Qian M F;Yue S
通过固溶和沉淀形成纳米Ti5Si3颗粒，显著提高了(Ti5Si3+TiBw)/Ti6Al4V复合材料的力学性能。在本研究中，与700和800 °C时的Ti6Al4V合金相比，纳米ti5si3颗粒的抗氧化性显著增强，并且随着ti5si3分数的增加而增强。纳米ti5si3颗粒的贡献主要表现在两个方面：1)有利于形成致密而薄的al2o3和SiO2混合膜，抑制了氧向基体的渗透；2)使tio2颗粒细化，提高了氧化皮的韧性和相对密度。两级分层结构也稳定了氧化垢。
Nano-Ti5Si3particles were formed via solution and precipitation, which drastically increased mechanical properties of (Ti5Si3+TiBw)/Ti6Al4V composites. In the present work, compared with Ti6Al4V alloy at 700 and 800 °C, nano-Ti5Si3particles led to remarkable enhancement of oxidation resistance, which increased with increasing Ti5Si3fractions. The contributions of nano-Ti5Si3particles were in two aspects: 1) were beneficial to forming dense and thin scale of mixed Al2O3and SiO2, which suppressed oxygen from permeating into matrix; 2) resulted in refinement of TiO2particles, which could enhance the toughness and relative density of oxide scale. The two-level hierarchical microstructure also stabilized oxide scale.