ABSTRACT The suitability of compaction equations commonly used in PM was investigated for the modelling of TiH2 powder compaction. Compressibility data of TiH2 powder fractions (<45, <150 and <355 μm) were obtained up to 800 MPa and fitted to the Heckel equation, as well as to the models of Gerdemann and Jablonski and Cooper and Eaton. Although a partial correlation was observed for the Heckel equation, the model provided a consistent approximation of TiH2 powder yield strength. An accurate fit was observed for the Gerdemann and Jablonski equation; however, considering the brittleness of TiH2, a more realistic depiction of the physical process was verified from the Cooper and Eaton model. By the addition of an exponential term to the original equation an excellent fit was attained, and compaction of TiH2 powders could be appropriately described according to the mechanisms of initial density, particle rearrangement, fragmentation and plastic deformation.

中文翻译：

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应用于氢化钛粉末压缩性数据建模的 PM 压实方程

摘要 研究了 PM 中常用的压实方程对 TiH2 粉末压实建模的适用性。TiH2 粉末部分（<45、<150 和 <355 μm）的压缩率数据在 800 MPa 下获得，并拟合 Heckel 方程以及 Gerdemann 和 Jablonski 以及 Cooper 和 Eaton 的模型。尽管观察到 Heckel 方程的部分相关性，但该模型提供了 TiH2 粉末屈服强度的一致近似值。观察到 Gerdemann 和 Jablonski 方程的精确拟合；然而，考虑到 TiH2 的脆性，Cooper 和 Eaton 模型验证了对物理过程更真实的描述。通过在原始方程中添加一个指数项，获得了极好的拟合，