Electronic Resource
s.l. ; Stafa-Zurich, Switzerland
Solid state phenomena
Vol. 118 (Dec. 2006), p. 167-172
ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The influence of direct current field (DCF) on powder-pack boriding has beeninvestigated by applying DCF between boriding agent and specimen during the soaking.Experimental results show that DCF has the function of heating the agent and the specimen and thusenhancing boriding. It is shown that the specimen’s side facing anode has the deepest boride casewhen the specimen is taken as cathode. It is proposed that DCF forces active boron-containingspecies to diffuse toward the specimen at the cathode. This makes boron concentration around thespecimen as cathode higher than that at the anode or other position and that in the conventionalpowder-pack boriding (CPB), which relatively decreases boron’s absorption by inner wall surfaceof the pack box and the non-working surface of the specimen. DCF’s physical effect of enhancingchemical reaction in the agent increases the activity and concentration of active boron atoms andboron-containing species, which overcomes the shortcoming that CPB can not produce enoughboron-containing species by conventional way of heating
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.118.167.pdf
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