本研究的目的在於探討冷軋加工對鈷基合金靶材的優先方位及磁通量之影響。
本研究採用三種不同冷軋程度的試片加以分析，分別是：鑄造後未經冷軋(0%)之試片(A)、鑄造後經1.2%冷軋程度之試片(B)以及鑄造後經7.7%冷軋程度之試片(C)。先以ICP成分分析以確定所含元素組成，配合X光繞射分析(XRD)所得之結果來判斷冷軋前後的組成相，再使用OM、SEM觀察冷軋前後的顯微結構組織，並使用EDS成分分析做進一步的相鑑定確認。另一方面，為了觀察冷軋是否造成試片產生優先方位，使用X光繞射所得之{2-1-10}極圖與{2-1-13}極圖來加以佐證。而磁性相關的實驗，則選擇以VSM測量冷軋前後之磁滯曲線。
XRD實驗結果顯示，試片存在Co(HCP)以及Co5Zr(FCC)結構，而A的靶材中央、B的靶材中央以及B的1/2靶材半徑區域等三處除了Co(HCP)與Co5Zr(FCC)外還存在Co(FCC)結構。X光繞射所得之{2-1-10}極圖與(2-1-13}極圖顯示，冷軋後並無顯著的優先方位產生。而磁透率方面，隨著冷軋程度的增加，磁通量呈現下降的趨勢。

In this study cobalt-based alloy of as-casted, after 1.2% and 7.7% cold-rolled was used to investigate the effect of cold rolling on the preferred orientation and the magnetic flux. The chemical composition and phase identification of the cobalt-based alloy were analyzed using induced-couple plasma (ICP) method and x-ray diffraction (XRD), respectively. Microstructures of samples were characterized by optical microscopy (OM) and scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) was served to identify the chemical composition of phases. Magnetization and preferred orientation behavior were measured by vibrating sample magnetometer (VSM) and pole figures of {2-1-10} and {2-1-13}, respectively.
It was observed that a hcp phase of Co and a fcc phase of Co5Zr exist in all samples from XRD results. The fcc phase of Co was found in the target center of as-casted and after 1.2% cold-rolling, and in the half radius region of the sample after 1.2% cold-rolling. After cold rolling up to 1.2% it was not able to observe a strong rolling texture from the {2-1-10} and {2-1-13} pole figures. The magnetic flux decreases with increasing cold rolling.

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