COMPUTER CONTROLLED CONTAINERLESS PROCESSING OF HIGH TEMPERATURE INTERMETALLIC COMPOUNDS
COMPUTER CONTROLLED CONTAINERLESS PROCESSING OF HIGH TEMPERATURE INTERMETALLIC COMPOUNDS
复制标题
高温金属间化合物的计算机控制无容器加工
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
D. D. Bruns
中科院分区：
文献类型：
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作者：
R. Reviere;B. Oliver;D. D. Bruns
摘要：本文研制了一种无容器自动化系统，用于从液态处理高温反应性金属间化合物。直径2.5厘米的单晶已在各种气氛下从近乎湍流的液体中加工出来。该液体以电磁方式包含，以允许凝固界面的扩展以控制所得到的尺寸和结构。根据材料的不同，工作温度达到近2000°C，产生的直径控制在±0.08 mm以内。需要专用计算机控制和数据采集系统的几个工作特性是其对输入变化的快速响应，对输入变化的敏感性，高度交互性，固有的瞬态行为和稳定运行的小参数区域。计算机控制系统由一台DEC 11/23+计算机和一个接口图像摄像机组成。控制系统是非接触式的，因为所有的测量都是直接进行的。
ABSTRACT A containerless automated system for processing high temperature reactive intermetallic compounds from the liquid state has been developed. Single crystals 2.5 cm in diameter have been processed in various atmospheres from nearly turbulent liquids. The liquid is electromagnetically contained in such a fashion as to permit the propagation of the solidification interface to control the resulting dimensions and structure. The operating temperature reaches nearly 2000°C depending upon the material and the resulting diameter control is within ± 0.08 mm Several operational characteristics that mandate the need for a dedicated computer control and data acquisition system are its fast response to changes in inputs, sensitivity to changes in inputs, highly interactive nature, inherent transient behavior and small parameter region of stable operation. The computer control system is built around a DEC 11/23+computer and an interfaced image camera. The control system is contactless as all measurements are fr...