陶瓷内衬复合铜管的自蔓延高温合成

Ceramic-Lined Copper Pipes Produced by A Centrifugal-SHS Process

  • 摘要: 开发了离心自蔓延高温合成陶瓷内衬复合铜管制造工艺, 研究了离心力和添加剂对复合铜管性能的影响。随着离心力增大, 陶瓷层的孔隙度降低、压溃强度和压剪强度明显提高, 离心力超过200G后, 压剪强度反而降低。铝热剂中加入SiO2也可降低孔隙度, 提高压剪强度。提高铝热剂预热温度, 可加快铝热反应速度, 改善复合铜管质量。

     

    Abstract: A new technology is proposed for the ceramic lining of a copper pipe inner surface by means of self-propagating high-temperature synthesis(SHS)under the influence of a centrifugal force and additives.The technique is characterized by a large amount of the reaction heat and the centrifugal force applied to the reaction products.With the increase of the centrifugal force, the porosity, the density the compressive strength and the compressive-shear strength of the products are improved, but centrifugal force excel 200G, the compressive-shear strength of the products is decreased.Adding SiO2 in thermite, the porosity, the density and the compressive-shear strength of the products are obviously improved.Increasing preheating temperature of thermite, the speed of thermite reactions quicken, the properties of products can also be improved.

     

/

返回文章
返回