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基于双组分微粉注射成型工艺制备的羟基磷灰石/氧化锆生物材料的微注射成型及脱脂行为

Micro-Injection Molding and Debinding Behavior of Hydroxyapatite/Zirconia Bi-Materials Fabricated by Two-Component Micro-Powder Injection Molding Process.

作者信息

Basir Al, Muhamad Norhamidi, Sulong Abu Bakar, Amin Muhammad Bin Mohamed, Jamadon Nashrah Hani, Radzuan Nabilah Afiqah Mohd

机构信息

Department of Mechanical and Manufacturing Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia.

出版信息

Materials (Basel). 2023 Sep 24;16(19):6375. doi: 10.3390/ma16196375.

DOI:10.3390/ma16196375
PMID:37834512
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10573493/
Abstract

The micro-scale joining of two different materials using two-component micro-powder injection molding (2C-µPIM) is an intriguing technique. The formation of defects in bi-materials at different processing stages makes this technique challenging. This study presents the fabrication of defect-free bi-material micro-parts containing hydroxyapatite (HA) and 3 mol% yttria-stabilized zirconia (3YSZ) via 2C-µPIM. Critical powder volume concentrations (CPVCs) of 61.7 vol% and 47.1 vol% were obtained for the HA and 3YSZ powders, respectively. Based on the CPVCs, the optimal loadings for the HA and 3YSZ powders were selected as 60 vol% and 45 vol%, respectively. The HA and 3YSZ feedstocks were prepared by separately mixing the optimal powder contents with low-density polyethylene (LDPE) and palm stearin binders. The feedstocks displayed pseudoplastic behavior, and the lowest ranges of viscosity for the HA and 3YSZ at a temperature of 180 °C were 157.1-1392.5 Pa·s and 726.2-985.5 Pa·s, respectively. The feedstocks were injected to produce green HA/3YSZ micro-sized components. It was found that a solvent debinding temperature of 70 °C removed 60.6% of the palm stearin binder from the sample. In the thermal debinding stage, the open channels that formed in the bi-material sample's solvent debound at 70 °C and contributed to the removal of 93 to 95% of the binder system. When the debound bi-materials were sintered at 1300 °C, the highest relative density of 96.3% was obtained. The sintering operation revealed a linear shrinkage between 13 and 17% in the sintered HA/3YSZ micro-parts.

摘要

使用双组分微粉注射成型（2C-µPIM）对两种不同材料进行微观尺度的连接是一项引人关注的技术。在不同加工阶段双材料中缺陷的形成使得这项技术具有挑战性。本研究通过2C-µPIM展示了包含羟基磷灰石（HA）和3摩尔%氧化钇稳定氧化锆（3YSZ）的无缺陷双材料微部件的制造。HA和3YSZ粉末的临界粉末体积浓度（CPVCs）分别为61.7体积%和47.1体积%。基于CPVCs，HA和3YSZ粉末的最佳装载量分别选择为60体积%和45体积%。通过将最佳粉末含量分别与低密度聚乙烯（LDPE）和棕榈硬脂粘结剂混合来制备HA和3YSZ原料。原料表现出假塑性行为，在180°C温度下HA和3YSZ的最低粘度范围分别为157.1 - 1392.5 Pa·s和726.2 - 985.5 Pa·s。将原料注射以生产绿色HA/3YSZ微型部件。发现70°C的溶剂脱脂温度从样品中去除了60.6%的棕榈硬脂粘结剂。在热脱脂阶段，在70°C溶剂脱脂的双材料样品中形成的开放通道有助于去除93%至95%的粘结剂体系。当脱脂后的双材料在1300°C烧结时，获得了96.3%的最高相对密度。烧结操作显示烧结后的HA/3YSZ微部件的线性收缩率在13%至17%之间。

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本文引用的文献

1
Effect of sintering parameters on physical and mechanical properties of powder injection moulded stainless steel-hydroxyapatite composite.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。
PLoS One. 2018 Oct 25;13(10):e0206247. doi: 10.1371/journal.pone.0206247. eCollection 2018.
2
A Review on the Use of Hydroxyapatite-Carbonaceous Structure Composites in Bone Replacement Materials for Strengthening Purposes.羟基磷灰石-含碳结构复合材料在用于强化目的的骨替代材料中的应用综述。
Materials (Basel). 2018 Sep 24;11(10):1813. doi: 10.3390/ma11101813.