The phase stability and mechanical properties of N-metallic carbides (N = 2–5) are assessed using entropy forming ability (EFA), mixing enthalpy, and Mazhnik-Oganov ab initio model of mechanical properties. EFA quantifies configurational disorder of solid solutions and is currently used to predict the phase stability and assess the hardness of high-entropy carbides with 5 transitional metals on the metallic sublattice. In this work, we use the concept of EFA for the 13 N-metallic carbides (N = 2–5), four of which are investigated for the first time. Additionally, we propose a semi-empiric version of the Mazhnik-Oganov model and perform micro-indentation testing of the investigated compositions to verify the model’s capabilities. The proposed approach allows for a fast modeling and microindentation-based screening of the most promising carbide solid solutions for more detailed characterization.

N-金属碳化物 (N = 2-5) 的相稳定性和机械性能使用熵形成能力 (EFA)、混合焓和机械性能的 Mzhnik-Oganov 从头算模型进行评估。EFA 量化固溶体的构型无序，目前用于预测相稳定性和评估金属亚晶格上具有 5 种过渡金属的高熵碳化物的硬度。在这项工作中，我们对 13 种 N 金属碳化物（N = 2-5）使用 EFA 的概念，其中四种是首次研究。此外，我们提出了 Mzhnik-Oganov 模型的半经验版本，并对所研究的成分进行微压痕测试，以验证模型的功能。