A systematic framework for choosing the most determinant combination of predictor features and solving the multiclass phase classification problem associated with high-entropy alloy (HEA) was recently proposed [1] . The data associated with that research paper, titled “ Machine learning-based prediction of phases in high-entropy alloys ”, is presented in this data article. This dataset is a systematic documentation and comprehensive survey of experimentally reported HEA microstructures. It contains microstructural phase experimental observations and metallurgy-specific features as introduced and reported in peer-reviewed research articles. The dataset is provided with this article as a supplementary file. Since the dataset was collected from experimental peer-reviewed articles, these data can provide insights into the microstructural characteristics of HEAs, can be used to improve the optimization HEA phases, and have an important role in machine learning, material informatics, as well as in other fields.

This is an author's version published in: http://oatao.univ-toulouse.fr/23777 ARTICLE INFO ABSTR ACT Keywor ds:ZnO Spark plasma slntering Nanopartlcles CeramJcs MicrostructureDue to the sensitivity of nanopowders and the challenges in controlling the grain sire and the density during the sintering of ceramics, a systernatic study was proposed to evaluate the densifi cation and the microstructure of ZnO oeramics using sparlc plasma sintering technique. Cornrnercially available ZnO powder was dried and sin tered at various parameters (ternperature (400-900 °C), pressure (250--850 MPa), atmosphere (Air/Vacuum) etc.). High pressure sintering is desirable for rnaintaining the nanostructure, though it brings a difficulty in obtaining a fully dense ceramic. Whereas, increasing the ternperature from 600 to 900 •c results in fully den sifi ed ceramics of about 99% which shows tn have big impact on the grain size. However, a high relative density of 92% is obtained at a ternperature as low as 400 •c under a pressure of 850 MPa. The application of pressure during the holding tirne seems tn lower the grain sire as compared to ceramics pressed during initial stage (room ternperature).

properties of ZnO ceramics densified through spark plasma sintering. (2020) Ceramics International, 46 (4). 1-10.