Effect of self-ion with high-energy irradiation on the surface morphology, microstructure and mechanical properties of nanocrystalline TiAlN coating
Effect of self-ion with high-energy irradiation on the surface morphology, microstructure and mechanical properties of nanocrystalline TiAlN coating
复制标题
高能辐照自离子对纳米晶TiAlN涂层表面形貌、微观结构和力学性能的影响
DOI：
10.1016/j.matchar.2022.112041
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发表时间：
2022-06
影响因子：
4.7
通讯作者：
X.P. Ouyang
中科院分区：
文献类型：
--
作者：
Z.Q. Zhang;L. Zhang;W.Q. Yan;Y.F. Zhang;H. Yuan;Y.Q. Shen;B. Liao;X. Zhang;F.S. Zhang;X. Ouyang;X.P. Ouyang
TiAlN涂层因其良好的耐腐蚀性而被用作核反应堆包壳保护材料。然而，长期暴露在极端恶劣的核环境中会导致退化，阈值辐射通量尚不清楚。采用过滤阴极真空弧技术，在L不锈钢和硅片上成功地沉积了纳米晶TiAlN涂层。研究了用GIC4117串列加速器进行不同剂量的Al3+辐照对TiAlN涂层组织和力学性能的影响。当辐照剂量为4.0×10 14ion/cm2时，TiAlN纳米晶涂层的晶粒度和柱状结构得到细化，硬度得到提高。当辐照剂量为4.0×1016ion/cm2时，TiAlN涂层的各项力学性能均下降，可作为涂层退化的阈值。这些纳米晶TiAlN涂层具有很高的表面完整性，没有剥落、剥落和起泡等破坏，并且经过辐照后具有良好的机械性能。·通过形成纳米晶结构和固溶体相获得了超硬(>；40 Gpa)。·微晶从初始状态的平均尺寸23±2 nm细化到18±2 nm。·离子辐照强化效果明显，硬度从42.5±1.3 Gpa提高到46.4±1.4 Gpa。·TiAlN涂层具有纳米多晶结构，辐照后结构完整，无起泡或剥落现象。
TiAlN coating are used as nuclear reactor cladding protective materials due to their good corrosion resistance. However, long-term exposure to an extremely harsh nuclear environment will cause degradation, and the threshold irradiation fluence is not clear. In this work, a nanocrystalline TiAlN coating was successfully deposited on 304 L stainless steel and silicon wafers by filtered cathodic vacuum arc (FCVA) technology. The effects of different fluences of Al 3+ irradiation performed by the GIC4117 tandem accelerator on the structure and mechanical properties of TiAlN coatings were studied. After irradiation with a fluence of 4.0 × 10 14 ions/cm 2 , the refinement of grain size and columnar structure of nanocrystalline TiAlN coatings was confirmed, which improved the hardness. The irradiation fluence of 4.0 × 10 16 ions/cm 2 reduces all mechanical properties and can be taken as the threshold for the degradation of the TiAlN coating. These nanocrystalline TiAlN coatings have high surface integrity with no destruction, such as flacking, exfoliation and blistering, and good mechanical properties after irradiation. • Ultra-hardness (>40 GPa) was obtained by the formation of nanocrystalline structure and solid solution phase. • The crystallites refined from the average size of 23 ± 2 nm for the initial state up to a size of 18 ± 2 nm. • The hardening effect was confirmed under ion irradiation and the hardness increases from 42.5 ± 1.3 GPa to 46.4 ± 1.4 GPa. • The TiAlN coating with nano-polycrystalline structure exhibits structural integrity without blistering or flaking effects after irradiation.