TY - JOUR
T1 - Mechanical and thermoelectric properties of iridium-ruthenium alloy grown by the micro-pulling-down method
AU - Murakami, Rikito
AU - Kamada, Kei
AU - Oikawa, Katsunari
AU - Yoshikawa, Akira
N1 - Funding Information:
This work was partially supported by (i) Cooperative Research and Development Center for Advanced Materials, Tohoku University, (ii) JSPS KAKENHI, Grant No. 19H00672, 17H06159, 18H01222, 19H00881, 19 K12626, 19 K12626, and 20 K20488. This article is based on results obtained from a project, JPNP12004, subsidized by the New Energy and Industrial Technology Development Organization (NEDO). We would like to thank the following people for their support: Ms. Shika Itoi, Mr. Kazuo Obara, Mr. Yasuhiro Shoji, Mr. Hiroaki Yamaguchi, Mr. Takayuki Nihei of C&A Corporation, Mr. Ryo Murakami, Mr. Takuya Yoshizawa, Mr. Hikaru Ishida, Prof. Nobuhumi Ueshima of Tohoku University, Tohoku University, Dr. Vladimir V. Kochurikhin of General Physics Institute. Mr. Issei Narita of the Cooperative Research and Development Center for Advanced Materials, Tohoku university, CHINO CORPORATION, Dr. Hideki Ogura, Dr. Tohru Nakano, Dr. Chiharu Urano of National Institute of Advanced Industrial Science and Technology.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/11/1
Y1 - 2021/11/1
N2 - Iridium, ruthenium, and iridium-ruthenium alloy wires were fabricated by the dewetting micro-pulling-down method, a type of unidirectional solidification method. The length of the grown Ir-20Ru reached 47 m. Furthermore, their mechanical and thermoelectric properties were investigated. The as-grown Ir-17.9Ru wire exhibited a tensile strength of approximately 765 MPa and a nominal fracture elongation of 21% at room temperature. After work-hardening by three cycles of winding and rewinding for a bending radius of 10 mm and annealing at 2273 K for 3 h, the tensile strength and fracture elongation of the Ir-Ru wire were 1061 MPa and 25%, respectively. From the electromotive force (EMF) characteristics of platinum obtained by integrating the Seebeck coefficient, the EMF characteristics from room temperature to ~ 2000 K of iridium, ruthenium, and Ir-17.9Ru were investigated. The EMF characteristics for several thermocouples using iridium, ruthenium, or Ir-17.9Ru as one of the pairs were estimated from the combination of the obtained EMF characteristics. Ir/Ir-17.9Ru showed similar EMF characteristics to Ir-40Rh/Ir.
AB - Iridium, ruthenium, and iridium-ruthenium alloy wires were fabricated by the dewetting micro-pulling-down method, a type of unidirectional solidification method. The length of the grown Ir-20Ru reached 47 m. Furthermore, their mechanical and thermoelectric properties were investigated. The as-grown Ir-17.9Ru wire exhibited a tensile strength of approximately 765 MPa and a nominal fracture elongation of 21% at room temperature. After work-hardening by three cycles of winding and rewinding for a bending radius of 10 mm and annealing at 2273 K for 3 h, the tensile strength and fracture elongation of the Ir-Ru wire were 1061 MPa and 25%, respectively. From the electromotive force (EMF) characteristics of platinum obtained by integrating the Seebeck coefficient, the EMF characteristics from room temperature to ~ 2000 K of iridium, ruthenium, and Ir-17.9Ru were investigated. The EMF characteristics for several thermocouples using iridium, ruthenium, or Ir-17.9Ru as one of the pairs were estimated from the combination of the obtained EMF characteristics. Ir/Ir-17.9Ru showed similar EMF characteristics to Ir-40Rh/Ir.
KW - A1 Solidification
KW - A2 Growth from melt
KW - A2 Single crystal growth
KW - B1 Alloys
KW - B1 Metals
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U2 - 10.1016/j.jcrysgro.2021.126256
DO - 10.1016/j.jcrysgro.2021.126256
M3 - Article
AN - SCOPUS:85113186686
SN - 0022-0248
VL - 573
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
M1 - 126256
ER -