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相关概念视频

Design Example: Aggregate Gradation01:24

Design Example: Aggregate Gradation

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The right type and quality of aggregates are crucial for concrete as they significantly influence its properties, mix proportions, and cost-effectiveness. If different sources are available for sand, the commonly used fine aggregate in concrete, the selection of sand is primarily based on its gradation.
The grading, or particle-size distribution, of sand is determined using sieve analysis, with standard sizes ranging from 150 μm to 10 mm (ASTM No. 100 sieve to 3⁄8 in. sieve). Sand is...
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Sieve Analysis and Grading Curves01:19

Sieve Analysis and Grading Curves

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Sieve analysis is a method used to determine the particle size distribution of aggregate materials. This process involves the following steps:
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相关实验视频

Updated: Jul 8, 2025

Additive Manufacturing of Functionally Graded Ceramic Materials by Stereolithography
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在粉末床融合过程中对分级结构的原型设计.

Maria Mann1, Richard Davies1, Chris Lawrence2

  • 1Centre for Additive Layer Manufacturing, Exeter Technologies Group, Streatham Campus, University of Exeter, Exeter, United Kingdom.

3D printing and additive manufacturing
|December 20, 2023
PubMed
概括

研究人员开发了一种用于粉床融合 (PBF) 增材制造的新型原型. 该系统可实现有针对性的多材料沉积和填充剂对齐,克服了PBF技术以前的局限性.

关键词:
在PA12中使用PA12.填充剂的对齐方式分级结构是分级结构.跳槽半角半角是什么意思粉末床融合是指一个粉末床的融合.粉末类风湿学 粉末类风湿学

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科学领域:

  • 添加剂制造 添加剂制造 添加剂制造
  • 材料科学 材料科学 材料科学
  • 粉末金工艺 在粉末金工艺

背景情况:

  • 在材料挤出 (MEX) 和立体石刻 (SLA) 中建立了有针对性的填料对齐,但在粉末床融合 (PBF) 中没有.
  • 在增材制造 (AM) 技术中,多材料的整合仍然是一个挑战.

研究的目的:

  • 在PBF系统中设计和原型一个针对多材料沉积和填充剂对齐的系统.
  • 解决当前PBF方法在处理复合粉末和实现精确材料放置方面的局限性.

主要方法:

  • 聚胺及其复合混合物的质性质,颗粒大小分布和颗粒形态的表征.
  • 设计和概念化一个原型多跳槽系统的原型,为特定的复合粉末优化跳槽角度.
  • 在PBF过程之外进行初始沉积试验,以评估层沉积特征.

主要成果:

  • 对粉末混合物特性的分析为功能性原型的设计提供了信息.
  • 通过初步试验证明了有针对性的多材料沉积的可行性.
  • 收集了关于沉积层特征的数据,以便进一步细化.

结论:

  • 开发的原型为PBF中的多材料沉积和有针对性的填充剂对齐提供了潜在的解决方案.
  • 了解材料特性对于设计在AM中有效的粉末处理系统至关重要.
  • 需要在PBF系统中进行进一步的集成和测试来验证性能.