骨骼在我們身體結構中扮演最重要的角色，同時保護著重要器官。不正確的骨折癒合可能導致骨骼強度減弱，扭轉力可能在癒合過程中引起新的裂縫，或在短時間內破壞骨折癒合的部位。接觸式癒合是一種通過為骨折的骨骼提供堅固的結構支持的療法，不僅提供支持，還可以在骨折表面之間形成橋樑，促進成骨過程。WE43是一種鎂合金，含有適合植入的稀土元素，因其可生物降解性而被認為適用。稀土元素的合金化顯示出良好的相容性，但在我們的體內對稀土元素的需求和存在都較少，即在我們的體內，稀土的存在量通常是ppm或ppb。本研究使用鈣而不是其他化合物來改善機械性能、生物相容性和可生物降解性更為合適，因為鈣的取得容易和成本較低。使用碳酸鈣已被證明對細胞增殖和成骨細胞分化具有高生存率。在這項工作中，蛋殼為可行且經濟實惠獲取鈣的來源，因為蛋殼含有90%或更多的碳酸鈣，每克雞蛋殼粉提供幾乎380毫克的鈣。採用球磨法研磨雞蛋殼並將其轉化為顆粒。通過常規攪拌鑄造法製備了含有最小量稀土元素的WE43合金和不同重量百分比的雞蛋殼顆粒。利用光學顯微鏡（OM）、能譜儀（EDS）和場發射掃描電子顯微鏡（FE-SEM）進行了微觀結構和成分分析，用於分析合金的組成和元素分佈。採用X射線衍射儀（XRD）分析了製備合金中可能存在的材料相。通過使用MTS 100k萬用測試機進行壓縮測試和Akashi MVK-H1進行維克氏硬度測試，研究了材料的機械性質。腐蝕部分，合金的長期浸泡腐蝕在37°C的烤箱中，浸泡在SBF溶液中進行，為期15天。使用OM、XRD、SEM和不同的EDS進行表面和橫截面分析，以了解鈍化層、化學成分和腐蝕剖面。結果顯示，含有1%wt和3%wt雞蛋殼顆粒的合金顯示出期望的機械性質，但Mg-3.5Y-3Es顯示出更好且均勻的腐蝕性質。

The alloying of rare earth elements shows good compatibility but both the need and presence of RREs in our body are less i.e., its presence is either ppm or ppb in our body. Using calcium instead of other compounds to improve mechanical properties, biocompatibility, and biodegradability is more suitable because of abundance and cost reduction. In this work, the feasible as well as economical calcium source was obtained by eggshells, as it has almost 90% or more calcium carbonate which provides almost 380 mg of calcium per gram of eggshell powder. Ball milling was used to crush the eggshells and convert them into powder. Conventional stir-casting fabricated a magnesium-based alloy with a minimal amount of rare earth elements as in WE43 and various weight percentages of eggshell particles. Microstructural and compositional analysis was done by optical microscopy (OM) and field emission scanning electron microscopy (FE-SEM) equipped with energy dispersive spectroscopy (EDS, Oxford ultimate max 100) which was employed to analyze the composition as well as elemental distribution. X-ray diffractometry (XRD) was used to analyze the possible phase presence in the fabricated alloy. Mechanical behavior was studied by compression test using an MTS 100k universal testing machine and microhardness using Akashi MVK-H1. The corrosion behavior of long-term immersion of the alloys was conducted in SBF solution at 37°C in an oven for 15 days. OM, XRD, SEM, and different EDS were used for surface as well as cross-section analysis to understand the passivation layer and the chemical composition and corrosion profile. The results revealed that the alloy with 1 and 3 wt.% eggshell particles shows the desired mechanical properties, but Mg-3.5Y-3Es show better corrosion uniformity.

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