East Los Angeles College, Monterey Park, CA 91754, USA.
Mater Sci Eng C Mater Biol Appl. 2013 Oct;33(7):4021-5. doi: 10.1016/j.msec.2013.05.044. Epub 2013 May 28.
Bulk metallic glasses (BMGs) possess attractive properties for biomedical applications, including high strength, hardness and corrosion resistance, and low elastic modulus. In this study, we conduct rotating beam fatigue tests on Pd43Ni10Cu27P20 bulk metallic glass in air and Eagle's medium (EM) and measure the corrosive resistance of the alloy by submersion in acidic and basic electrolytes. Fatigue results are compared to those of commonly used biometals in EM. Rotating beam fatigue tests conducted in air and in Eagle's medium show no deterioration in fatigue properties in this potentially corrosive environment out to 10(7) cycles. A specimen size effect is revealed when comparing fatigue results to those of a similar alloy of larger minimum dimensions. Corrosion tests show that the alloy is not affected by highly basic (NaOH) or saline (NaCl) solutions, nor in EM, and is affected by chlorinated acidic solutions (HCl) to a lesser extent than other commonly used biometals. Corrosion in HCl initiates with selective leaching of late transition metals, followed by dissolution of Pd.
块状金属玻璃 (BMG) 在生物医学应用中具有吸引力的特性，包括高强度、硬度和耐腐蚀性，以及低弹性模量。在这项研究中，我们在空气中和 Eagle 培养基 (EM) 中对 Pd43Ni10Cu27P20 块状金属玻璃进行旋转梁疲劳试验，并通过浸泡在酸性和碱性电解质中来测量合金的耐腐蚀性。将疲劳结果与 EM 中常用的生物金属进行比较。在空气中和 Eagle 培养基中进行的旋转梁疲劳试验表明，在这种潜在腐蚀性环境中，疲劳性能在 10(7) 个循环内没有恶化。当将疲劳结果与具有更大最小尺寸的类似合金进行比较时，会发现试样尺寸效应。腐蚀试验表明，该合金不受高碱性 (NaOH) 或盐性 (NaCl) 溶液的影响，也不受 EM 的影响，并且受氯化酸性溶液 (HCl) 的影响小于其他常用的生物金属。在 HCl 中腐蚀始于后期过渡金属的选择性浸出，随后 Pd 溶解。
