The use of the hydrogenation and disproportionation (HD) and desorption and recombination (DR) route (HDDR) for sintering Nd₂Fe₁₄B-based ferromagnetic alloys, such as Nd_11.7Fe_81.1Zr_1.2B₆ and Nd₁₆Fe_73.9Zr_2.1B₈, was studied by scanning electron microscopy and energy-dispersive X-ray spectroscopy. The dependence between the production conditions—grinding of the alloys into powders, compaction pressure of the powders, hydrogen pressure and temperature at the first stage of sintering in hydrogen (HD), and temperature at the second stage of sintering in vacuum (DR)—and the porosity and microstructural particle size of the sintered materials was evaluated. The powders were ground in hydrogen in a planetary-ball mill at 200 rpm for 1 h and compacted at 2, 5, and 6 t/cm². The first sintering stage was carried out at a hydrogen pressure of 0.05 MPa and a temperature of 760°C, and the second stage at 850 and 950°C. The powders were found to sinter at the first stage. The porosity of the sintered materials decreased with increasing compaction pressure. The grain size of the ferromagnetic Nd_11.7Fe_81.1Zr_1.2B₆ phase in the sintered materials ranged from 100 to 300 nm. The physical mechanism behind the reduction in the sintering temperature was attributed to an increase in the diffusion rate of alloy components resulting from hydrogen-induced phase transformations, such as disproportionation and recombination, and to the presence of a hydrogen solid solution at both stages of the process, HD and DR. A very important aspect of this research is that the powders were sintered under low hydrogen pressure required to produce magnetically anisotropic materials. Problematic aspects of the properties shown by the sintered materials, particularly microstructural heterogeneity, were analyzed, and approaches to their solution, through homogenizing the particle size of the powders and optimizing the HDDR parameters (hydrogen pressure, temperature, reaction time), were proposed. The process advantages of the new sintering method compared to similar techniques included the temperature lower by more than 100°C, the potential for producing nanostructured anisotropic materials, and the use of technically simpler and cheaper sintering furnaces.

使用氢化歧化（HD）和解吸重组（DR）路线（HDDR）烧结Nd ₂ Fe ₁₄ B基铁磁合金，例如Nd _11.7 Fe _81.1 Zr _1.2 B ₆和Nd ₁₆ Fe _73.9 Zr _2.1乙₈，通过扫描电子显微镜和能量色散X射线光谱进行了研究。生产条件——将合金研磨成粉末、粉末的压制压力、氢气中烧结第一阶段的氢气压力和温度（HD）以及真空烧结第二阶段的温度（DR）之间的依赖性——并对烧结材料的孔隙率和微观结构粒度进行了评价。将粉末在行星式球磨机中以 200 rpm 的速度在氢气中研磨 1 小时，并以 2、5 和 6 t/cm ^2压实。第一阶段的烧结在0.05MPa的氢气压力和760℃的温度下进行，第二阶段的温度为850℃和950℃。发现粉末在第一阶段烧结。烧结材料的孔隙率随着压制压力的增加而降低。_{铁磁体Nd 11.7} Fe _81.1 Zr _1.2 B ₆晶粒尺寸烧结材料中的相范围为 100 至 300 nm。烧结温度降低背后的物理机制归因于氢引起的相变（例如歧化和复合）导致合金成分的扩散速率增加，以及在烧结的两个阶段都存在氢固溶体。流程、HD 和 DR。这项研究的一个非常重要的方面是粉末是在生产磁各向异性材料所需的低氢压力下烧结的。分析了烧结材料性能的问题，特别是微观结构的不均匀性，并通过均匀化粉末的粒径和优化 HDDR 参数（氢气压力、温度、反应时间）来解决这些问题，被提议。与类似技术相比，新烧结方法的工艺优势包括温度降低100°C以上、生产纳米结构各向异性材料的潜力以及使用技术上更简单、更便宜的烧结炉。