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An outlook on the mechanical attributes and load curve analysis of hydrothermally acquired hydroxyapatite bioceramic nanoparticles
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.physb.2020.412223
A. Alinda Shaly , G. Hannah Priya , J. Mary Linet

Hydroxyapatite (HA) is a compound that is analogous to the natural human bone mineral. This aspect of hydroxyapatite entitles it as a bioceramic bone implant material. Since hydroxyapatite needs to be biocompatible and strong to withstand the body, it is imperative to study its mechanical properties as well. With an interest to understand the hardness behaviour of hydroxyapatite from a different perspective, load-displacement curve analysis was done herein using Onitsch and Kick's power laws. Hydroxyapatite was procured by adopting an adept hydrothermal method and its general and mechanical properties were scrutinized. Debye-Scherrer method yielded an average crystallite size of 37.1 nm, whereas Williamson-Hall method provided an estimated size of 39.6 nm. Morphological analysis revealed the formation of unique hexagonal nanorods. FTIR spectrum further ascertained the purity of hydroxyapatite. Vicker's hardness tester was utilized to examine the mechanical properties of hardness, fracture toughness, brittleness index and yield strength. From the load curve analysis, the material resistance constants k1, k2 and the indentation depth were found to be 4.71 kg/mm, 22.06 kg/mm and 0.159 mm, respectively. Statistical analysis done by ANOVA evinced the aptness of Onitsch load curve model. Hydroxyapatite manifested itself as a strong and applicable bioceramic by brandishing a hardness of around 5.05 GPa along with a fracture toughness of 1.04 MPam1/2.



中文翻译:

水热获得羟基磷灰石生物陶瓷纳米粒子的力学特性和载荷曲线分析的前景

羟基磷灰石(HA)是类似于天然人类骨骼矿物质的化合物。羟基磷灰石的这一方面使其具有生物陶瓷骨植入材料的资格。由于羟基磷灰石必须具有生物相容性并能承受人体,因此必须研究其机械性能。为了从不同的角度了解羟基磷灰石的硬度行为,本文使用Onitsch和Kick的幂定律进行了载荷-位移曲线分析。采用熟练的水热法制备了羟基磷灰石,并对其一般和力学性能进行了研究。Debye-Scherrer方法产生的平均晶粒尺寸为37.1 nm,而Williamson-Hall方法提供的估计尺寸为39.6 nm。形态分析揭示了独特的六角形纳米棒的形成。FTIR光谱进一步确定了羟基磷灰石的纯度。使用维氏硬度计检查硬度,断裂韧性,脆性指数和屈服强度的机械性能。从载荷曲线分析,材料电阻常数k由图1可知,k 2和压入深度分别为4.71kg / mm,22.06kg / mm和0.159mm。ANOVA进行的统计分析证明了Onitsch负荷曲线模型的适用性。羟基磷灰石通过挥舞约5.05 GPa的硬度和1.04 MPam 1/2的断裂韧性来表现为一种强大的生物陶瓷。

更新日期:2020-05-01
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