ABSTRACT During Supersolidus Liquid Phase Sintering the viscosity of beams affects the deflection level, thus in sintering practice also the tendency to distortion. Although the deflection value increases with decreasing viscosity, a concentration gradient from surface to centre of samples may neutralise the effect of viscosity. In this paper, the deflection behaviour of Cu-28Zn beams, manufactured from prealloyed powder, at various temperatures and times ranging from 910 to 950°C and 0–90 min, respectively, was studied. The midpoint deflection was measured by the in situ bending images. To better understand the deflection behaviour, experimental results were mathematically modelled using general deflection equations. To obtain further information, microstructural studies were performed using optical and scanning electron microscopy. It is concluded that zinc evaporation influences the chemical composition and generates a thin solid layer around the sample resulting in a parabolic deflection behaviour with temperature and non-linear with time.

中文翻译：

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预合金阿尔法黄铜在烧结过程中的挠曲行为：原位弯曲技术和建模

摘要 在 Supersolidus 液相烧结过程中，梁的粘度会影响偏转水平，因此在烧结实践中也有变形的趋势。尽管挠度值随着粘度的降低而增加，但从样品表面到中心的浓度梯度可能会抵消粘度的影响。在本文中，分别研究了由预合金粉末制成的 Cu-28Zn 梁在不同温度和时间（分别为 910 至 950°C 和 0-90 分钟）下的偏转行为。通过原位弯曲图像测量中点挠度。为了更好地理解偏转行为，使用一般偏转方程对实验结果进行数学建模。为了获得更多信息，使用光学和扫描电子显微镜进行了微观结构研究。