Abstract In the present research, a bio-composite material was initially designed and developed as per the requirement of prosthesis implants. Hydroxyapatite (HA) is considered as one of mostly used biomaterial due their unique characteristics of similarity in the composition of human bone and its bioactivity. Ti–6Al–4V is one of the foremost used materials in bio-implants due to their strength, wear resistance, corrosion resistance and bio-compatibility. The addition of HA in Ti alloy substantially improves its bioactivity and biocompatibility. However, at the same time, the wear rate of bio-composite increases. In the present work, Ti–6Al–4V/hydroxyapatite composite was developed by powder metallurgy method. To evaluate the real-time tribological characterization, the biocomposite was processed against the Al2O3 counter-surface in the presence of phosphate buffered saline (PBS) as a lubricant. In terms of characterization, the pin-on-disk tribometer was used for the evaluation of wear rate and friction coefficients in the range of 5 N–30 N of load. Scanning electron microscopy (SEM) micrographs revealed that plastic deformation and the abrasion are the main mechanisms of biocomposite/Al2O3 system. The pull-out material from the biocomposite plays a negative role on the friction coefficient and wear rate.

中文翻译：

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用于生物植入应用的 Ti-6Al-4V/羟基磷灰石复合材料的设计、开发和摩擦学表征

摘要 在目前的研究中，根据假体植入物的要求，初步设计和开发了一种生物复合材料。羟基磷灰石（HA）由于其与人体骨骼组成及其生物活性相似的独特特征而被认为是最常用的生物材料之一。Ti-6Al-4V 因其强度、耐磨性、耐腐蚀性和生物相容性而成为生物植入物中最常用的材料之一。在钛合金中加入HA显着提高了其生物活性和生物相容性。然而，与此同时，生物复合材料的磨损率增加。在目前的工作中，Ti-6Al-4V/羟基磷灰石复合材料是通过粉末冶金方法开发的。为了评估实时摩擦学特征，在存在磷酸盐缓冲盐水 (PBS) 作为润滑剂的情况下，将生物复合材料对着 Al2O3 反面进行处理。在表征方面，销盘式摩擦计用于评估 5 N-30 N 载荷范围内的磨损率和摩擦系数。扫描电子显微镜 (SEM) 显微照片显示塑性变形和磨损是生物复合材料/Al2O3 系统的主要机制。从生物复合材料中取出的材料对摩擦系数和磨损率有负面影响。扫描电子显微镜 (SEM) 显微照片显示塑性变形和磨损是生物复合材料/Al2O3 系统的主要机制。从生物复合材料中取出的材料对摩擦系数和磨损率有负面影响。扫描电子显微镜 (SEM) 显微照片显示塑性变形和磨损是生物复合材料/Al2O3 系统的主要机制。从生物复合材料中取出的材料对摩擦系数和磨损率有负面影响。