Characterization of thick plasma spray tungsten coating on ferritic/martensitic steel F82H for high heat flux armor
Characterization of thick plasma spray tungsten coating on ferritic/martensitic steel F82H for high heat flux armor
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DOI：
10.1016/j.jnucmat.2008.12.219
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发表时间：
2009-04
影响因子：
3.1
通讯作者：
Y. Yahiro;M. Mitsuhara;K. Tokunakga;N. Yoshida;T. Hirai;K. Ezato;S. Suzuki;M. Akiba;H. Nakashima
中科院分区：
文献类型：
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作者：
Y. Yahiro;M. Mitsuhara;K. Tokunakga;N. Yoshida;T. Hirai;K. Ezato;S. Suzuki;M. Akiba;H. Nakashima
采用真空等离子喷涂技术（VPS）和空气等离子喷涂技术（APS）在铁素体/马氏体钢F82 H表面制备了两种类型的钨涂层，以评价其作为等离子体装甲的可能性。VPS-W/F82 H显示出上级的性能。VPS-W涂层的孔隙率约为0.6%，大部分孔隙小于1-2μm，W/F82 H与W/W结合良好。热负荷试验表明，该涂层作为热负荷下的等离子体装甲具有很高的潜力。然而，在APS-W/F82 H的情况下，孔隙率为6%，并且热负荷性能比VPS-W/F82 H差得多。等离子喷涂过程中的表面氧化可能降低了连接性能。值得注意的是，这两种涂层在适当的热处理后产生了软铁氧体夹层，这可能是由于生产后界面处的高残余应力。这表明中间层作为应力释放的潜在功能和这种涂层组分在热负荷下可能的高性能。
Two types of plasma spray tungsten coatings on ferritic/martensitic steel F82H made by vacuum plasma spray technique (VPS) and air plasma spray technique (APS) were examined in this study to evaluate the possibility as plasma-facing armor. The VPS-W/F82H showed superior properties. The porosity of the VPS-W coatings was about 0.6% and most of the pores were smaller than 1–2μm and joining of W/F82H and W/W was fairly good. Thermal load tests indicated high potential of this coating as plasma-facing armor under thermal loading. In case of APS-W/F82H, however, porosity was 6% and thermal load properties were much worse than VPS-W/F82H. It is likely that surface oxidation during plasma spray process reduced joining properties. Remarkably, both coatings created soft ferrite interlayer after proper heat treatments probably due to high residual stress at the interfaces after the production. This indicates the potential function of the interlayer as stress relieve and possible high performance of such coating component under thermal loads.