JOINING OF ALUMINUM MATRIX COMPOSITES BY PLASMA SPRAYING
Tsuyoshi Itsukaichi. Minoru Umemoto, Isao Okane
Proceeding's of the International Conference
abstract：Aluminum matrix composite joints have bein produced on both aluminum alloy and aluminum alloy matrix composite substrates using powders containing Sic particu- lates. The results of preliminary joining experiments indicate that the sub- strate should be preheated to 473 K arid a very wide bevel angle should be provided in order to obtain the highest strength joints. Heat treatment after spraying significantly improved the bond strength and restored the precipitation hardening ir the matrix. Significant amounts of Mg were lost from the deposit during spraying while some free silicon was produced by pyrolysis of the Sic powder: hence, further efforts must develop powder compositions which produce the optimum matrix composition in the sprayed-deposit. Hot isostatic pressing of the samples to eliminate porosity had only a small effect on the final strength of the joints. No significant amount of AldCs was detected in deposits ahich contained Sic.
本站文章未经允许不得转载；如欲转载请注明出处，北京桑尧科技开发有限公司网址：http://www.sunspraying.com/
|
