The arc-melted Mo–Fe–B alloys with boron content up to ~41 at.% were studied after annealing at subsolidus temperatures by X-ray diffraction, differential thermal analysis, SEM/EMPA, and Pirani– Altertum technique for measurement of incipient melting temperatures. The partial solidus surface projection was constructed for the first time in the Mo–MoB 1.0 –FeB ~0.8 –Fe region using our own experimental and literature data. The Mo 2 FeB 2 ternary compound has a two-phase equilibrium at subsolidus temperatures with each of the binary and unary phases from the constituent binary systems. The Mo 2 FeB 2 phase has a wide homogeneity range for metal content: 14–27 at.% Fe. A three-phase α-MoB + β-MoB + Mo 2 B region exists close to the Mo–B side of the Gibbs composition triangle. In addition, a three-phase region composed by the Mo 2 FeB 2 ternary compound and two iron modifications is shown to exist: BCC (δ-Fe) and FCC (γ-Fe). Another ternary compound, Mo x Fe 3–x B, with molybdenum content of 1.3–2.0 at.% is present at subsolidus temperatures in two structural modifications: orthorhombic (Fe 3 C-type structure) and tetragonal (Ti 3 P-type structure). The intermetallic μ-(Mo 6 Fe 7 ) phase in the Mo–Fe–B ternary system takes part in the three-phase equilibria on the solidus surface: σ-(MoFe) + μ-(Mo 6 Fe 7 ) + Mo 2 FeB 2 at 1375 ± ± 10°C, μ-(Mo 6 Fe 7 ) + Mo 2 FeB 2 + R-(Mo 2 Fe 3 ) at 1340 ± 10°C, and σ-(MoFe) + μ-(Mo 6 Fe 7 ) + R-(Mo 2 Fe 3 ) at 1385 ± 10°C.

中文翻译：

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Mo-Fe-B 系统的固相线表面

在亚固相线温度下退火后，通过 X 射线衍射、差热分析、SEM/EMPA 和 Pirani-Altertum 技术对硼含量高达 ~41 at.% 的电弧熔炼 Mo-Fe-B 合金进行了研究熔化温度。使用我们自己的实验和文献数据，首次在 Mo-MoB 1.0 -FeB ~0.8 -Fe 区域构建了部分固相线表面投影。Mo 2 FeB 2 三元化合物在亚固相线温度下与来自组成二元系统的二元和一元相中的每一个具有两相平衡。Mo 2 FeB 2 相具有广泛的金属含量均质范围：14–27 at.% Fe。三相α-MoB + β-MoB + Mo 2 B 区域存在于Gibbs 组成三角形的Mo-B 侧附近。此外，显示存在由 Mo 2 FeB 2 三元化合物和两种铁变体组成的三相区域：BCC (δ-Fe) 和 FCC (γ-Fe)。另一种三元化合物 Mo x Fe 3–x B 的钼含量为 1.3–2.0 at.%，在亚固相线温度下存在两种结构变体：正交（Fe 3 C 型结构）和四方晶系（Ti 3 P 型结构） ）。Mo-Fe-B三元体系中的金属间μ-(Mo 6 Fe 7 )相参与了固相线表面的三相平衡：σ-(MoFe) + μ-(Mo 6 Fe 7 ) + Mo 2 FeB 2 at 1375 ± ± 10°C, μ-(Mo 6 Fe 7 ) + Mo 2 FeB 2 + R-(Mo 2 Fe 3 ) at 1340 ± 10°C, and σ-(MoFe) + μ-(Mo 6 Fe 7 ) + R-(Mo 2 Fe 3 ) 在 1385 ± 10°C。% 在亚固相线温度下以两种结构变型存在：正交（Fe 3 C 型结构）和四方晶（Ti 3 P 型结构）。Mo-Fe-B三元体系中的金属间μ-(Mo 6 Fe 7 )相参与了固相线表面的三相平衡：σ-(MoFe) + μ-(Mo 6 Fe 7 ) + Mo 2 FeB 2 at 1375 ± ± 10°C, μ-(Mo 6 Fe 7 ) + Mo 2 FeB 2 + R-(Mo 2 Fe 3 ) at 1340 ± 10°C, and σ-(MoFe) + μ-(Mo 6 Fe 7 ) + R-(Mo 2 Fe 3 ) 在 1385 ± 10°C。% 在亚固相线温度下以两种结构变型存在：正交（Fe 3 C 型结构）和四方晶（Ti 3 P 型结构）。Mo-Fe-B三元体系中的金属间μ-(Mo 6 Fe 7 )相参与了固相线表面的三相平衡：σ-(MoFe) + μ-(Mo 6 Fe 7 ) + Mo 2 FeB 2 at 1375 ± ± 10°C, μ-(Mo 6 Fe 7 ) + Mo 2 FeB 2 + R-(Mo 2 Fe 3 ) at 1340 ± 10°C, and σ-(MoFe) + μ-(Mo 6 Fe 7 ) + R-(Mo 2 Fe 3 ) 在 1385 ± 10°C。