Component Shape Retention in Liquid Phase Sintering of Prealloyed Powders

预合金粉末液相烧结中的部件形状保持

基本信息

  • 批准号:
    9610280
  • 负责人:
  • 金额:
    $ 29.26万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    1997
  • 资助国家:
    美国
  • 起止时间:
    1997-03-01 至 2000-02-29
  • 项目状态:
    已结题

项目摘要

9610280 German New research on supersolidus liquid phase sintering (SLPS) addresses three topics. The first examines microstructural evolution during heating and sintering. A current model of the process makes assumptions on the rate of grain growth, liquid film thickness, shrinkage rate, semisolid particle viscosity, and causes of distortion. These assumptions are addressed by experimentation performed on model systems using microstructure measurements from quenched samples and in situ testing. The goal is to increase the model reality and to recognize any behavior between systems. The second topic is the prediction of final component size and shape. A computational prediction for the loss of structural rigidity as liquid spreads on the grain boundaries needs verification. Furthermore, gradients in grain size, particle size, packing density, substrate friction, and heat transfer need to be included in the final component size and shape predictions. The third activity extends the model to several other processing conditions (bimodal-sized powders, powders of differing compositions, high viscosity systems, reactive systems). %%% Success in this research should positively impact the use of the SLPS process to produce full density, complex shapes via powder metallurgy. A research target is tool steels where there are opportunities to use SLPS in the near net-shape production of high performance tooling. ***
9610280德国关于超固相线液相烧结(SLPS)的新研究涉及三个主题。第一部分考察了加热和烧结过程中的显微组织演变。目前的过程模型对颗粒生长速率、液膜厚度、收缩速率、半固体颗粒粘度和变形原因进行了假设。通过在模型系统上进行的实验,使用淬火样品的微观结构测量和现场测试,解决了这些假设。目标是增加模型的真实性,并识别系统之间的任何行为。第二个主题是最终部件大小和形状的预测。当液体在晶界上扩散时,结构刚性损失的计算预测需要验证。此外,颗粒大小、颗粒大小、堆积密度、衬底摩擦和热传递方面的梯度需要包括在最终的部件尺寸和形状预测中。第三个活动将模型扩展到其他几个工艺条件(双峰尺寸的粉末、不同组成的粉末、高粘度体系、反应体系)。这项研究的成功将对SLPS工艺的使用产生积极的影响,该工艺通过粉末冶金生产全密度、复杂的形状。一个研究目标是有机会在高性能模具的近净成形生产中使用SLP的工具钢。***

项目成果

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Randall German其他文献

Randall German的其他文献

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{{ truncateString('Randall German', 18)}}的其他基金

US Egypt Cooperative Research: Development of High Performance Nano-Sized Tungsten Heavy Alloy Composites by Powder Metallurgy
美埃合作研究:粉末冶金开发高性能纳米钨重合金复合材料
  • 批准号:
    0914424
  • 财政年份:
    2009
  • 资助金额:
    $ 29.26万
  • 项目类别:
    Standard Grant
A Workshop for Scientific Issues on Medical Applications of Micro/Nano Powder Injection Molding-Molding, Sintering, Modeling, and Commercial Applications
微/纳米粉末注射成型医学应用科学问题研讨会——成型、烧结、建模和商业应用
  • 批准号:
    0738021
  • 财政年份:
    2008
  • 资助金额:
    $ 29.26万
  • 项目类别:
    Standard Grant
A Workshop for Scientific Issues on Medical Applications of Micro/Nano Powder Injection Molding-Molding, Sintering, Modeling, and Commercial Applications
微/纳米粉末注射成型医学应用科学问题研讨会——成型、烧结、建模和商业应用
  • 批准号:
    0913099
  • 财政年份:
    2008
  • 资助金额:
    $ 29.26万
  • 项目类别:
    Standard Grant
International Research Experience for Students (IRES)in Innovative Sintered Materials
创新烧结材料学生国际研究体验 (IRES)
  • 批准号:
    0603608
  • 财政年份:
    2005
  • 资助金额:
    $ 29.26万
  • 项目类别:
    Standard Grant
International Research Experience for Students (IRES)in Innovative Sintered Materials
创新烧结材料学生国际研究体验 (IRES)
  • 批准号:
    0525887
  • 财政年份:
    2005
  • 资助金额:
    $ 29.26万
  • 项目类别:
    Standard Grant
Acquisition of Thermal Analysis Equipment for Engineering Materials
购置工程材料热分析设备
  • 批准号:
    9900172
  • 财政年份:
    1999
  • 资助金额:
    $ 29.26万
  • 项目类别:
    Standard Grant
Process Specification for Powder Metallurgy Component Fabrication to Targeted Features and Quality: An Inverse Problem
粉末冶金部件制造达到目标特征和质量的工艺规范:反问题
  • 批准号:
    9813207
  • 财政年份:
    1998
  • 资助金额:
    $ 29.26万
  • 项目类别:
    Continuing Grant
Equipment: Acquistion of Advanced Rheological System
设备:购置先进的流变系统
  • 批准号:
    9800237
  • 财政年份:
    1998
  • 资助金额:
    $ 29.26万
  • 项目类别:
    Standard Grant
Acquisition of Elemental Analysis Equipment for Engineering Materials
购置工程材料元素分析设备
  • 批准号:
    9622213
  • 财政年份:
    1996
  • 资助金额:
    $ 29.26万
  • 项目类别:
    Standard Grant
Acquisition of a Three-Dimensional Microscopic Image Analysis Systems
三维显微图像分析系统的获取
  • 批准号:
    9500119
  • 财政年份:
    1995
  • 资助金额:
    $ 29.26万
  • 项目类别:
    Standard Grant

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