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首页> 美国卫生研究院文献>PLoS Clinical Trials >Effect of sintering parameters on physical and mechanical properties of powder injection moulded stainless steel-hydroxyapatite composite
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Effect of sintering parameters on physical and mechanical properties of powder injection moulded stainless steel-hydroxyapatite composite

机译：烧结参数对粉末注射成型不锈钢-羟基磷灰石复合材料物理力学性能的影响

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摘要

The combination of metallic bio-inert material, stainless-steel 316L (SS316L) and a bio-active material, hydroxyapatite (HA) can produce a composite which has superior properties for orthopaedic applications. The main objective of this study is to investigate the effects of sintering temperature and holding time on the physical and mechanical properties of the sintered part. 50wt.% SS316L and 50wt.% HA were mixed with a binder system of palm stearin (PS) and polyethylene (PE) at 61 vol.% powder loading. Rheological properties show a pseudo-plastic behaviour of the feedstock, where viscosity decreases with increasing shear rate. The feedstock was injection moulded into a tensile bar shape while thermal debinding was carried out at 320°C and 500°C. The brown parts were sintered at 1000, 1100, 1200 and 1300°C, with three different sintering times of 1, 3 and 5 hours in the furnace. It was found that the highest sintered density measured was 95.61% of the theoretical density. In addition, the highest hardness and Young’s modulus measured were 150.45 HV and 52.61 GPa respectively, which are higher than those of human bone. The lowest percentage of carbon content was 0.022wt.% given by the sample sintered at 1300°C for 1 hour. Therefore, SS316L/HA composite with good mechanical and physical properties was successfully produced through the PIM process.
机译：金属生物惰性材料，不锈钢316L（SS316L）和生物活性材料羟基磷灰石（HA）的组合可以生产出具有优异性能的复合材料，可用于骨科。这项研究的主要目的是研究烧结温度和保温时间对烧结零件的物理和机械性能的影响。将50重量％的SS316L和50重量％的HA与棕榈硬脂精（PS）和聚乙烯（PE）的粘合剂体系以61体积％的粉末负载量混合。流变性质显示了原料的假塑性行为，其中粘度随着剪切速率的增加而降低。将原料注塑成拉伸棒状，同时在320℃和500℃下进行热脱脂。将棕色部分在1000、1100、1200和1300℃下烧结，在炉中进行三种不同的烧结时间，分别为1、3和5小时。发现测得的最高烧结密度为理论密度的95.61％。此外，测得的最高硬度和杨氏模量分别为150.45 HV和52.61 GPa，高于人体骨骼。由在1300℃下烧结1小时的样品给出的最低碳含量百分比为0.022wt。％。因此，通过PIM工艺成功生产了具有良好机械和物理性能的SS316L / HA复合材料。

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