Solid solution range of boron, microhardness and oxidation resistance of the perovskite type RERh3Bx (RE = Gd, Y, Sc) compounds

Toetsu Shishido; Jinhua Ye; Kunio Kudou; Shigeru Okada; Kazuo Obara; Takamasa Sugawara; Masaoki Oku; Kazuaki Wagatsuma; Hiroyuki Horiuchi; Tsuguo Fukuda

doi:10.1016/S0925-8388(99)00239-X

Solid solution range of boron, microhardness and oxidation resistance of the perovskite type RERh₃B_x (RE = Gd, Y, Sc) compounds

Toetsu Shishido, Jinhua Ye, Kunio Kudou, Shigeru Okada, Kazuo Obara, Takamasa Sugawara, Masaoki Oku, Kazuaki Wagatsuma, Hiroyuki Horiuchi, Tsuguo Fukuda

Materials Processing and Characterization Division

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23 Citations (Scopus)

Abstract

Polycrystalline samples of RERh₃B_x (RE = Gd, Y, Sc), which consists of a reactive RE and high melting point Rh and B elements, are successfully synthesized by the arc melting method. RERh₃B_x compounds have the perovskite type cubic structure (space group Pm3m). Perovskite type phases of GdRh₃B_x and YRh₃B_x exist in the range of approximately 0.444≤x≤1.000. On the other hand, phase of ScRh₃B_x exists in the range of 0≤x≤1.000 (0 to 20 mol% B). ScRh₃, in the case of x = 0, has AuCu₃ type structure; its space group is also Pm3m. The lattice parameter a in RERh₃B_x depends on x and the value of a increases with increasing boron content x. The value of Vickers microhardness of the RERh₃B_x at room temperature ranges from 6 to 10 GPa. According to thermo-gravimetric and differential thermal analysis for RERh₃B_x (RE = Gd, Y) heating up to 1200 °C in air, a mixed phase of REBO₃ and Rh is identified as an oxidized product. In the case of ScRh₃B, the oxidized product consists of Rh, Sc₂O₃ and ScBO₃.

Original language	English
Pages (from-to)	52-56
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	291
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(99)00239-X
Publication status	Published - 1999 Sep 27

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0925-8388(99)00239-X

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Solid solution range of boron, microhardness and oxidation resistance of the perovskite type RERh₃B_x (RE = Gd, Y, Sc) compounds. / Shishido, Toetsu; Ye, Jinhua; Kudou, Kunio; Okada, Shigeru; Obara, Kazuo; Sugawara, Takamasa; Oku, Masaoki; Wagatsuma, Kazuaki; Horiuchi, Hiroyuki; Fukuda, Tsuguo.

In: Journal of Alloys and Compounds, Vol. 291, No. 1-2, 27.09.1999, p. 52-56.

Research output: Contribution to journal › Article › peer-review

Shishido, Toetsu ; Ye, Jinhua ; Kudou, Kunio ; Okada, Shigeru ; Obara, Kazuo ; Sugawara, Takamasa ; Oku, Masaoki ; Wagatsuma, Kazuaki ; Horiuchi, Hiroyuki ; Fukuda, Tsuguo. / Solid solution range of boron, microhardness and oxidation resistance of the perovskite type RERh₃B_x (RE = Gd, Y, Sc) compounds. In: Journal of Alloys and Compounds. 1999 ; Vol. 291, No. 1-2. pp. 52-56.

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title = "Solid solution range of boron, microhardness and oxidation resistance of the perovskite type RERh3Bx (RE = Gd, Y, Sc) compounds",

abstract = "Polycrystalline samples of RERh3Bx (RE = Gd, Y, Sc), which consists of a reactive RE and high melting point Rh and B elements, are successfully synthesized by the arc melting method. RERh3Bx compounds have the perovskite type cubic structure (space group Pm3m). Perovskite type phases of GdRh3Bx and YRh3Bx exist in the range of approximately 0.444≤x≤1.000. On the other hand, phase of ScRh3Bx exists in the range of 0≤x≤1.000 (0 to 20 mol% B). ScRh3, in the case of x = 0, has AuCu3 type structure; its space group is also Pm3m. The lattice parameter a in RERh3Bx depends on x and the value of a increases with increasing boron content x. The value of Vickers microhardness of the RERh3Bx at room temperature ranges from 6 to 10 GPa. According to thermo-gravimetric and differential thermal analysis for RERh3Bx (RE = Gd, Y) heating up to 1200 °C in air, a mixed phase of REBO3 and Rh is identified as an oxidized product. In the case of ScRh3B, the oxidized product consists of Rh, Sc2O3 and ScBO3.",

author = "Toetsu Shishido and Jinhua Ye and Kunio Kudou and Shigeru Okada and Kazuo Obara and Takamasa Sugawara and Masaoki Oku and Kazuaki Wagatsuma and Hiroyuki Horiuchi and Tsuguo Fukuda",

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T1 - Solid solution range of boron, microhardness and oxidation resistance of the perovskite type RERh3Bx (RE = Gd, Y, Sc) compounds

AU - Shishido, Toetsu

AU - Ye, Jinhua

AU - Kudou, Kunio

AU - Okada, Shigeru

AU - Obara, Kazuo

AU - Sugawara, Takamasa

AU - Oku, Masaoki

AU - Wagatsuma, Kazuaki

AU - Horiuchi, Hiroyuki

AU - Fukuda, Tsuguo

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N2 - Polycrystalline samples of RERh3Bx (RE = Gd, Y, Sc), which consists of a reactive RE and high melting point Rh and B elements, are successfully synthesized by the arc melting method. RERh3Bx compounds have the perovskite type cubic structure (space group Pm3m). Perovskite type phases of GdRh3Bx and YRh3Bx exist in the range of approximately 0.444≤x≤1.000. On the other hand, phase of ScRh3Bx exists in the range of 0≤x≤1.000 (0 to 20 mol% B). ScRh3, in the case of x = 0, has AuCu3 type structure; its space group is also Pm3m. The lattice parameter a in RERh3Bx depends on x and the value of a increases with increasing boron content x. The value of Vickers microhardness of the RERh3Bx at room temperature ranges from 6 to 10 GPa. According to thermo-gravimetric and differential thermal analysis for RERh3Bx (RE = Gd, Y) heating up to 1200 °C in air, a mixed phase of REBO3 and Rh is identified as an oxidized product. In the case of ScRh3B, the oxidized product consists of Rh, Sc2O3 and ScBO3.

AB - Polycrystalline samples of RERh3Bx (RE = Gd, Y, Sc), which consists of a reactive RE and high melting point Rh and B elements, are successfully synthesized by the arc melting method. RERh3Bx compounds have the perovskite type cubic structure (space group Pm3m). Perovskite type phases of GdRh3Bx and YRh3Bx exist in the range of approximately 0.444≤x≤1.000. On the other hand, phase of ScRh3Bx exists in the range of 0≤x≤1.000 (0 to 20 mol% B). ScRh3, in the case of x = 0, has AuCu3 type structure; its space group is also Pm3m. The lattice parameter a in RERh3Bx depends on x and the value of a increases with increasing boron content x. The value of Vickers microhardness of the RERh3Bx at room temperature ranges from 6 to 10 GPa. According to thermo-gravimetric and differential thermal analysis for RERh3Bx (RE = Gd, Y) heating up to 1200 °C in air, a mixed phase of REBO3 and Rh is identified as an oxidized product. In the case of ScRh3B, the oxidized product consists of Rh, Sc2O3 and ScBO3.

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Solid solution range of boron, microhardness and oxidation resistance of the perovskite type RERh₃B_x (RE = Gd, Y, Sc) compounds

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