Fundamental principles of spark plasma sintering of metals: Part III – densification by plasticity and creep deformation

Fundamental principles of spark plasma sintering of metals: Part III – densification by plasticity and creep deformation
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金属放电等离子烧结的基本原理:第三部分 â 通过塑性和蠕变变形实现致密化

DOI:
10.1080/00325899.2020.1834748
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发表时间:
2020
期刊:
影响因子:
1.4
通讯作者:
Kieback B.
Kieback B.
中科院分区:
材料科学4区
文献类型:
--
作者:
Trapp J;Semenov A;Nöthe M;Wallmersperger T;Kieback B.

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对球形铜颗粒放电等离子烧结(SPS)过程中的致密化机理进行了实验研究和理论分析。实验测得的致密化速率进行比较,从Coble蠕变,Nabarro-Herring蠕变,幂律蠕变,和压力辅助烧结所描述的两个粒子模型的致密化的预期贡献。结果表明,在相对密度为70%的温度和压力范围内,通过Coble蠕变或幂律蠕变的低温版本进行致密化。研究结果支持(i)使用多恩方法获得的各种条件下的活化能以及(ii)的致密化速率的压力依赖性。
The mechanisms of densification during spark plasma sintering (SPS) of spherical copper particles are investigated both experimentally and analytically. Experimentally measured densification rates are compared to expected contributions to densification coming from Coble creep, Nabarro-Herring creep, power-law creep, and pressure-assisted sintering described by the two-particle model. The results indicate densification by Coble creep or a low-temperature version of power-law creep in the investigated range of temperature and pressure at a relative density of 70%. The findings are supported by (i) activation energies obtained for various conditions using the Dorn-method as well as (ii) the pressure dependence of the densification rate.
DOI: 10.1111/j.1151-2916.1968.tb15939.x
发表时间: 1968
影响因子: 3.9
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