C101 ニッケル多孔体のシンタリング特性解析のための分子動力学的研究(OS5 水素・燃料電池)

抄録

To clarify the sintering property of porous nickel, we simulated the porous nickel models by using molecular dynamics and constructed master sintering curve (MSC) based on the combined stage sintering model to obtain the sintering properties, such as sintering activation energy, dominant sintering mechanisms, and sintering behavior. To construct MSC, we simulated various porous models with changing the initial porosity and synthesized the simulation results. From analysis of constructed MSC, we found that apparent sintering activation energy increased with temperature. This increment of sintering activation energy indicates that dominant sintering mechanism changes with temperature. By using molecular dynamics sintering simulation, we can compare experimental MSC based on thermal history with theoretical MSC based on sintering mechanism and material property.