Densification and Grain Growth of Nanocrystalline Ceramic Powder under High Temperature

机译：高温下纳米晶陶瓷粉的致密化和晶粒长大

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Densification behavior, grain growth, and phase transformation of nanocrystalline titaniarnpowder compacts were investigated under pressureless sintering, hot pressing, and coldrnisostatic pressing.rnBased on the model by Kwon and Kim for the conventional ceramic powder, a novel modelrnwas proposed for densification of nanocrystalline ceramic powder at high temperature byrnincluding the exponential driving force and the effect of high pressure on the decrease ofrndiffusivity. The proposed model was implemented into a finite element program (ABAQUS)rnto compare with experimental data. By using equations from the literature, grain growth andrnphase transformation of nanocrystalline titania powder were also studied. The agreementsrnbetween experimental data and finite element results were good for nanocrystalline titaniarnpowder under pressureless sintering and hot pressing.

机译：在无压烧结，热压和冷等静压下研究了纳米晶钛粉体的致密化行为，晶粒长大和相变。基于Kwon和Kim对常规陶瓷粉的模型，提出了一种新型的纳米晶陶瓷粉的致密化模型。在高温下，包括指数驱动力和高压对扩散率降低的影响。将该模型实施到有限元程序（ABAQUS）中以与实验数据进行比较。利用文献中的方程，还研究了纳米晶二氧化钛粉末的晶粒长大和相变。在无压烧结和热压条件下，实验数据与有限元结果之间的一致性很好。

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来源
《Asian Pacific conference for fracture and strength'99 (APCFS'99)》|1999年|p.1-29|共29页
会议地点 Xian(CN);Xian(CN)
作者
K. T. Kim; H. G. Kim;
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Department of Mechanical EngineeringrnPohang University of Science and TechnologyrnPohang 790-784, Korea;

rnDepartment of Mechanical EngineeringrnPohang University of Science and TechnologyrnPohang 790-784, Korea;

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Densification and Grain Growth of Nanocrystalline Ceramic Powder under High Temperature

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