• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >A practical route for the characterization of zinc powder compacts with the aid of instrumented indentation and scratch tests
【24h】

A practical route for the characterization of zinc powder compacts with the aid of instrumented indentation and scratch tests

机译：借助仪器压痕和划痕测试表征锌粉压块的实用途径

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the current investigation the microstructural and mechanical properties of zinc compacted pallets were investigated. The pallets were compacted to different normalized densities (81-93%) under different pressures of 150, 200 and 450 MPa, respectively. The effect of sintering the samples under inert environment at 378 ℃ was also studied. Instrumented nanoindentation tests were utilized to deduce the mechanical properties of the compacted pallets. Nanoscratch tests were employed to qualitatively measure the sample resistance to plastic deformation. It was observed that there are two mechanisms driving the improvement of the mechanical properties. One mechanism is due to recrystallization driven by the increasing dislocation density and the other mechanism is due to consolidation of the particles into a continuous network due to diffusion and grain growth under high temperature sintering. The results also reveal that the mechanical properties and densities of the tablets are not linearly proportional to the compaction pressure. Higher compaction pressures resulted in denser tablets with higher elastic modulus and hardness. Upon sintering the compacts soften but also form a solid network due to the neighboring particles diffusion. Therefore, the hardness value drops but the reduced modulus increases. Furthermore, the nanoscratch tests revealed that higher compaction pressure produce not only a more compacted tablet, but also a more homogeneous one.
机译：在目前的研究中，研究了锌压实板的微观结构和机械性能。将托盘分别在150、200和450 MPa的不同压力下压实为不同的归一化密度（81-93％）。还研究了在378℃惰性环境下烧结样品的效果。利用仪器化的纳米压痕测试来推导压实的托盘的机械性能。纳米划痕测试用于定性测量样品的抗塑性变形能力。观察到有两种机制驱动机械性能的改善。一种机理是由于位错密度增加而引起的再结晶，另一种机理是由于高温烧结下的扩散和晶粒长大导致颗粒固结成连续的网络。结果还表明，片剂的机械性能和密度与压实压力不成线性比例。较高的压制压力导致具有较高弹性模量和硬度的致密片剂。烧结后，由于附近的颗粒扩散，压坯变软但也形成坚固的网络。因此，硬度值降低，但是模量降低。此外，纳米划痕试验表明，较高的压实压力不仅产生更压实的片剂，而且产生更均一的片剂。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号