Mohammed Haetham G, Albarody Thar Mohammed Badri, Susilawati Susilawati, Gohery Scott, Doyan Aris, Prayogi Saiful, Bilad Muhammad Roil, Alebrahim Reza, Saeed Anwar Ameen Hezam
Department of Mechanical Engineering, Universiti Teknologi Petronas, Seri Iskandar 32610, Malaysia.
Master of Science Education Program, University of Mataram, Mataram 83125, Indonesia.
Materials (Basel). 2021 May 18;14(10):2650. doi: 10.3390/ma14102650.
This paper introduces a new spark plasma sintering technique that is able to order crystalline anisotropy by in-series/in situ DC electric coupled magnetic field. The process control parameters have been investigated on the production of anisotropic BaFeO magnets based on resulted remanence (Mr). Sintering holding time (H.T.), cooling rate (C.R.), pressure (P), and sintering temperature (S.T.) are optimized by Taguchi with L9 orthogonal array (OA). The remanent magnetization of nanocrystalline BaFeO in parallel (Mr) and perpendicular (Mr) to the applied magnetic field was regarded as a measure of performance. The Taguchi study calculated optimum process parameters, which significantly improved the sintering process based on the confirmation tests of BaFeO anisotropy. The magnetic properties in terms of Mr and Mr were greatly affected by sintering temperature and pressure according to ANOVA results. In addition, regression models were developed for predicting the Mr as well as Mr respectively.
本文介绍了一种新的火花等离子体烧结技术，该技术能够通过串联/原位直流电场耦合磁场来使晶体各向异性有序排列。基于剩余磁感应强度（Mr），对各向异性钡铁氧体磁体生产过程中的工艺控制参数进行了研究。采用田口方法的L9正交阵列（OA）对烧结保温时间（H.T.）、冷却速率（C.R.）、压力（P）和烧结温度（S.T.）进行了优化。将纳米晶钡铁氧体平行（Mr）和垂直（Mr）于外加磁场的剩余磁化强度作为性能指标。田口研究计算出了最佳工艺参数，基于钡铁氧体各向异性的验证试验，该参数显著改善了烧结过程。根据方差分析结果，烧结温度和压力对Mr和Mr的磁性能有很大影响。此外，还分别建立了预测Mr和Mr的回归模型。
