Angularity evaluation of milled WC-Co powder
by Priit Kulu, Valdek Mikli, Helmo Kaerdi, Michal Besterci
International Journal of Materials and Product Technology (IJMPT), Vol. 22, No. 4, 2005

Abstract: Technological properties of powders depend on their granularity and powder particle morphology. The grindability of hardmetal powder, the dynamics of milling and changes in particle granularity and morphology were studied. For particle morphology analysis, the irregularity parameter as well as particle roundness and aspect ratio were found out. In order to characterise the granularity, the mean particles size was measured and volume distribution function, median size and probability density function of the particles volume were calculated. For describing the angularity of milled powders, so-called ''spike parameter – quadratic fit'' (SPQ) was properly described and real experiments for determination of SPQ sensitivity and precision to characterise particles angularity were performed. Using the coefficients of variation for SPQ and particle shape parameters, the dispersions changes in dependence on the milling duration was investigated. Experiments for determination the influence of hardmetal particles angularity to erosion rate of different metallic materials show the essentiality of this parameter in powders shape characterisation.

Online publication date: Thu, 10-Mar-2005

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Materials and Product Technology (IJMPT):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com