Laser melting deposited self-passivating 90W-10Cr coatings on reduced activation ferritic/martensitic steel using 90W-7Ni-3Fe interlayers
Laser melting deposited self-passivating 90W-10Cr coatings on reduced activation ferritic/martensitic steel using 90W-7Ni-3Fe interlayers
复制标题
使用 90W-7Ni-3Fe 中间层在减少活化的铁素体/马氏体钢上激光熔化沉积自钝化 90W-10Cr 涂层
DOI：
10.1016/j.jnucmat.2021.153029
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发表时间：
2021-04
影响因子：
3.1
通讯作者：
G. M.
中科院分区：
文献类型：
--
作者：
Wu;B. D;Yang;X. S;Zhou;Y. Z;Liu;X;Li;J. F;Huang;X. F;Le;G. M.
考虑到聚变反应堆冷却剂丢失事故(LOCA)，钨铬涂层是一种很有前途的面向等离子体的材料，需要与低活化铁素体/马氏体钢(RAFM)制造的结构部件连接。激光熔化沉积(LMD)是一种很有前途的在RAFM钢表面沉积W-Cr涂层的添加剂制造技术。为了降低涂层/基材界面的应力集中，先在RAFM钢表面沉积了90W-7Ni-3Fe中间层，然后再沉积W-Cr涂层。在不同稀释率的RAFM钢衬底上制备了两层厚度相近的中间层，厚度约为750μm。这两个中间层都消除了无中间层的基体/涂层界面处产生的裂纹，从而改善了RAFM钢和W-Cr涂层的连接。在衬底/层间界面或中间层/涂层界面没有观察到气孔或裂纹。涂层的顶部和中顶部区域具有独特的显微组织，显示出W颗粒嵌入到铬基基体中。与高稀释率中间层的基材/中间层和中间层/涂层界面的高硬度相比，低稀释率中间层的界面硬度要低得多。此外，对于低稀释率中间层，界面处的硬度急剧下降。由于未熔合、残留气体或低熔点元素的蒸发，钨铬涂层上会形成气孔。对于沉积在低稀释率中间层上的W-Cr涂层，可以观察到裂纹。空气气氛下的热重分析表明，与纯W相比，W-Cr涂层具有可靠的抗氧化性能。
As promising plasma facing materials considering the loss of coolant accident (LOCA) in fusion reactors, W-Cr coatings need to be joined to the structural components manufactured with reduced activation ferritic/martensitic (RAFM) steel. Laser melting deposition (LMD) is a promising additive manufacturing technique to deposit W-Cr coatings on the RAFM steels. In order to reduce the stress concentration at the coating/substrate interface, 90W-7Ni-3Fe interlayers were deposited on the RAFM steel by LMD before the deposition of W-Cr coatings. Two interlayers with similar thickness of about 750 μm were prepared with different dilution rates from the RAFM steel substrates. Both interlayers have improved the joining of RAFM steels and W-Cr coatings by eliminations of cracks, which originate at the substrate/coating interfaces without interlayers. No pores or cracks are observed at the substrate/interlayer interfaces, or the interlayer/coating interfaces. The top and mid-top regions of coatings have unique microstructures showing W particles embedded in Cr based matrix. Compared to the high hardness at the substrate/interlayer and interlayer/coating interfaces for the high dilution rate interlayer, the interface hardness is much lower for the low dilution rate interlayer. Moreover, sharp decreases of hardness happen at the interfaces for the low dilution rate interlayer. Pores are formed at the W-Cr coatings due to the lack of fusion, residual of delivered gas, or evaporations of low melting point elements. For W-Cr coatings deposited on the low dilution rate interlayers, cracks can be observed. The thermogravimetric analysis under air atmosphere indicates reliable anti-oxidation performance of the W-Cr coatings compared to the pure W.
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影响因子：
1.7
作者：
S. Konuru;U. V;A. Sarma
通讯作者：
S. Konuru;U. V;A. Sarma
铁基非晶合金钎焊钨及低活化铁素体-马氏体钢接头的显微组织
影响因子：
1.7
作者：
Wang J B;Lian Y Y;Feng F;Chen Z;Tan Y;Yang S;Liu X;Qiang J B;Liu T Z;Wei M Y;Wang Y M
通讯作者：
Wang Y M
激光熔化沉积工艺在低活化铁素体/马氏体钢上制备钨铬涂层
影响因子：
3.1
作者：
Wu B. D.;Liu X.;Li J. F.;Zhou Y. Z.;Yang X. S.;Huang X. F.;Le G. M.
通讯作者：
Le G. M.
DOI：
10.1016/j.ijrmhm.2018.08.005
发表时间：
2018-12
影响因子：
3.6
作者：
Chun Li;Shiyu Ma;Xue Liu;Jin-Feng Li;G. Le
通讯作者：
Chun Li;Shiyu Ma;Xue Liu;Jin-Feng Li;G. Le
影响因子：
1.7
作者：
D. Bachurina;A. Suchkov;J. Gurova;M. Savelyev;P. S. Dzhumaev;I. Kozlov;R. Svetogorov;M. Leont'eva-S
通讯作者：
D. Bachurina;A. Suchkov;J. Gurova;M. Savelyev;P. S. Dzhumaev;I. Kozlov;R. Svetogorov;M. Leont'eva-S