成果報告書詳細
管理番号20110000000721
タイトル*平成22年度中間年報 イットリウム系超電導電力機器技術開発 超電導ケーブル・超電導変圧器線材開発 線材安定製造技術開発
公開日2011/8/25
報告書年度2010 - 2010
委託先名財団法人ファインセラミックスセンター
プロジェクト番号P08016
部署名エネルギー対策推進部
和文要約和文要約等以下本編抜粋:1. 研究開発の内容および成果等 1.1 CeO2シード層およびY2O3シード層を用いた結晶粒配向金属基板上のPLD-GdBCO線材の微細構造解析 超電導電力ケーブル用に結晶粒配向金属基板を用いたイットリウム超電導系線材が開発されている。超電導電力ケーブル対応線材の安定製造技術を支援するため、本節では、異なる2種類の中間層が形成された結晶粒配向金属基板上にパルスレーザー蒸着(PLD)法により形成されたGdBa2Cu3Oy(GdBCO)線材について、透過型電子顕微鏡(TEM)を用いて行った微細構造解析結果を述べる。結晶粒配向金属基板上に形成された中間層はCeO2/YSZ/CeO2中間層とCeO2/YSZ/Y2O3中間層の2種類である。金属基板にNi結晶粒配向金属基板を用いた。
英文要約Title: Technological Development of Yttrium-based Superconducting Power Equipment (FY2008-FY2010) FY2010 Annual Report
Yttrium-based coated conductors have been developed. We characterized the microstructures of the coated conductors using transmission electron microscopy (TEM) and scanning electron microscopy (SEM) in detail. These results have been fed back to the production processes to achieve high performance and low production cost of the coated conductors. We observed cross-section of the edge of scribed conductor filaments and divided coated conductor, to support development of scribing process and dividing process of the coated conductor for reduction of AC loss. We studied microstructures of pulsed laser deposition (PLD)-GdBa2Cu3Oy (GdBCO) layers. The critical current (Ic) values of the coated conductor didn’t increase with growing the thicker GdBCO layer, because the volume of outer growth grains became larger in GdBCO layer. Since the outer growth grains nucleate on secondary phase (CuO, Ba-Cu-O, Gd-Ba-O), it is important to suppress nucleation of the secondary phase during the PLD process for fabrication of a high performance coated conductors. We observed microstructures of Gd(Y)BCO layer with several kinds of nano-sized particles to improve the Ic values of the layer in high magnetic fields. In metal organic deposition process, we found that density of the BaZrO3 (BZO) particles in YGdBCO layers depended on the molar content of the zirconium oxide in the stating solution. In addition, the Ic values of the YGdBCO layer became larger with increasing the content of BZO in the YGdBCO. In PLD process, we observed both BaSnO3(BSO) and BaZrO3(BZO) nano-rods in GdBCO layers. In chemical vapor deposition process, we found the distribution of (Y,Gd)2O3 particles with about 10 nm size in an YGdBCO layer. These particles should act as artificial pinning centers in high magnetic fields, and the distribution of the particles in the superconductive layer must enhance the Ic values of these coated conductors. We studied microstructures of CeO2/LaMnO3/MgO/Gd-Zr-O multilayer on Hastelloy tape. When non-homogenous MgO layer was deposited on Gd-Zr-O layer, polycrystalline LaMnO3 and CeO2 were formed on it. Contamination on Hastelloy was considered to cause the formation of the non-homogenous MgO layer. Therefore, it is important to remove the contamination on Hastelloy to deposit highly oriented and bi-axially textured CeO2/LaMnO3/MgO/Gd-Zr-O multilayer on it.
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