金屬具有高強度、高韌性、抗腐蝕能力佳、高可塑性、良好的加工性及高經濟性等優點等，從19世紀開始金屬被使用於生醫領域，主要功能是作為骨科用植入材，幫助骨頭的固定讓患部可以加速癒合。目前常用的金屬生醫材料有不銹鋼、鈷鉻合金、鈦及鈦合金等，然而這些植入材在植入於人體後無法被人體降解，因此當患部痊癒後需要進行二次手術將植入材取出，進行二次手術不僅對患者有一定程度的傷害及風險，也會浪費醫療資源。
可降解性金屬生醫材料能夠在人體內被組織降解，當患部痊癒後植入材也自然消失，因此可以避免二次手術帶來的風險與危害，讓復原能力較差的中老年病患可以避免二次手術，也可以解決植入永久性植入材的患者可能需要長期服用藥物的問題。
本研究使用兩種在人體中無毒性且可降解的金屬：鐵及鋅作為研究材料，期許能夠將此複合材料應用於骨科植入材。目前可降解性金屬所需要的降解速率與真實需求不符，無法得到適中的降解速率。利用冷壓成形並施加不同熱處理的鐵鋅複合材料為主要研究對象，並會與純鐵及純鋅進行比較。評估材料經過不同製程處理後的微結構、腐蝕性質等，分析並歸納出成分、製程與性質之間的關係，期許可以供未來作為可降解性金屬植入材之研究參考。

SUMMARY
In recent years, biodegradable metallic material is a developing research objectives in biomaterial field because the implant made by degradable metallic material can naturally degrade in human body and the patients with poor resilience are able to avoid the second surgery.
In part 1,in order to find the most efficient method to obtain the pure Fe/Zn compound, we use cold press to form the sample and apply different heat treatments of composite materials. Finally, we analysis the composition of the sample to find out what Fe/Zn compound do we get. In part 2, we mix the compound obtained in part 1 and the iron powder well and then form the sample by using cold press to get the Fe/Zn composite. At last, we compare the composition , microstructure, porosity and corrosion rate of the composites under different experiment parameters and Fe/Compound ratio.
When Fe/Zn composites sinter at T1℃ for t4 hours, the amount of the pores in the sample is much low and the compositions of the sample are Fe/Zn compound – Fe4Zn9 and iron. The corrosion rate of the Fe/Zn composite is significantly faster than the pure iron and zinc because the corrosion rate of the Fe/Zn compound is much faster than pure iron and zinc and the appearance of the pores from sintering also fastens the corrosion rate.

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