| The phase boundaries for the YCd₃-Zn pseudo-binary section of the yttrium-cadmium-zinc ternary system are presented. The boundaries were studied through differential thermal analysis, metallographic, electron micro-probe analysis, neutron activation analysis, and x-ray diffraction studies. A ternary compound, whose composition was established to be (YCd₃)Zn₂, which decomposes peritectically at 757℃ was found in this section. Two other compounds, whose compositions were thought to be Y₃Cd₄Zn_7 and ∼Y₂CdZn_(14), which decompose congruently at 840 and 875℃ in the range of 10.0∼25.0 w/o Zn and 32.0∼90.0 w/o Zn, respectively. X-ray diffraction studies revealed that Y₃Cd₄Zn_7, is orthorhombic and (YCd)₃Zn₂, and∼Y₂Cd Zn_(14), are hexagonal and monoclinic, respectively, with. a=15.103±4, c=14.985±6Å (YCD₃)₃Zn₂, and a=10.234±7, b=9.038±5, c=6.822±9Å , β=99.40˚(∼Y₂CdZn_(14)) |
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