Basir Al, Sulong Abu Bakar, Muhamad Norhamidi, Juri Afifah Z, Jamadon Nashrah Hani, Foudzi Farhana Mohd, Radzuan Nabilah Afiqah Mohd
Department of Mechanical and Manufacturing Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, Malaysia.
Polymers (Basel). 2024 Jun 27;16(13):1831. doi: 10.3390/polym16131831.
The fabrication of bi-material micro-components via two-component micro-powder injection moulding (2C-µPIM) from 3 mol% yttria-stabilised zirconia (3YSZ) and micro/nano bimodal stainless steel 316L (SS 316L) powders has received insufficient attention. Apart from this, retaining the bonding between ceramic and metal at different processing stages of 2C-µPIM is challenging. This study investigated the solvent and thermal debinding mechanisms of green bi-material micro-parts of 3YSZ and bimodal SS 316L without collapsing the ceramic/metal joining. In this research, feedstocks were prepared by integrating the powders individually with palm stearin and low-density polyethylene binders. The results demonstrated that during the solvent debinding process, the palm stearin removal rate in the bi-materials composed of 3YSZ and bimodally configured SS 316L feedstocks intensified with an increase in temperature. The establishment of interconnected pores in the solvent-debound components facilitated the thermal debinding process, which removed 99% of the binder system. Following sintering, the debound bi-materials exhibited a relative density of 95.3%. According to a study of the microstructures using field emission scanning electron microscopy, an adequate bond between 3YSZ and bimodal SS 316L was established in the micro-part after sintering. The bi-material sintered at 1350 °C had the highest hardness of 1017.4 HV along the joining region.
通过双组分微粉注射成型(2C-µPIM)由3摩尔%氧化钇稳定氧化锆(3YSZ)和微米/纳米双峰不锈钢316L(SS 316L)粉末制造双材料微部件受到的关注不足。除此之外,在2C-µPIM的不同加工阶段保持陶瓷与金属之间的结合具有挑战性。本研究调查了3YSZ和双峰SS 316L绿色双材料微部件的溶剂脱脂和热脱脂机制,同时不破坏陶瓷/金属结合。在本研究中,通过将粉末分别与棕榈硬脂和低密度聚乙烯粘结剂混合来制备原料。结果表明,在溶剂脱脂过程中,由3YSZ和双峰配置的SS 316L原料组成的双材料中棕榈硬脂的去除率随着温度的升高而增强。溶剂脱脂部件中相互连通的孔隙的形成促进了热脱脂过程,该过程去除了99%的粘结剂体系。烧结后,脱脂双材料的相对密度为95.3%。根据用场发射扫描电子显微镜对微观结构的研究,烧结后的微部件中3YSZ和双峰SS 316L之间建立了充分的结合。在1350℃烧结的双材料在结合区域的硬度最高,为1017.4 HV。