Pressureless co-sintering behaviour of a steel/cemented carbide component: model bimaterial

2012 ◽  
Vol 103 (3) ◽  
pp. 296-308 ◽  
Author(s):  
Céline Pascal ◽  
Aurélie Thomazic ◽  
Annie Antoni-Zdziobek ◽  
Jean-Marc Chaix
Keyword(s):  
Cemented Carbide ◽  
Component Model ◽  
Sintering Behaviour ◽  
Carbide Component

Influence of the Addition of Rare-Earth Elements on the Sintering of Cemented Carbide

2006 ◽  
Vol 530-531 ◽  
pp. 347-352 ◽  
Author(s):  
C.M.F. Gomes ◽  
L.C.O. Santos ◽  
A.G.P. Silva ◽  
Uilame Umbelino Gomes ◽  
J.N.F. Holanda
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Mechanical Strength ◽  
Earth Element ◽  
Linear Shrinkage ◽  
Cemented Carbide ◽  
Vacuum Furnace ◽  
Oxide Addition ◽  
Sintering Behaviour

This work presents the results of a study concerning the influence of the addition of rareearth elements (La2O3 and CeO2) on the sintering of the WC/10Co cemented carbide. Several WC/10Co mixtures containing up to 3 wt.% rare-earth of the cobalt phase were prepared. Specimens were uniaxially pressed at 200 MPa, and sintered in a vacuum furnace at 1400 °C during 60 minutes. The sintering behaviour was accompanied by the linear shrinkage, density, and mechanical strength. The development of the microstructure was followed by XRD and SEM. The results showed that the sintering behaviour of the WC/10Co cemented carbide was influenced by adding of rare-earth element. In addition, the lanthanium oxide addition was more effective on the improvement of the physical-mechanical properties of the studied carbide.

Comparison of Principal Component Solutions in Two Populations

Methodology ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Gregor Sočan
Keyword(s):  
Simulation Study ◽  
Principal Components ◽  
Common Factor ◽  
Principal Component ◽  
Component Model ◽  
Bootstrap Procedure ◽  
Factor Loadings ◽  
Component Loadings ◽  
Principal Component Model ◽  
Two Populations

Abstract. When principal component solutions are compared across two groups, a question arises whether the extracted components have the same interpretation in both populations. The problem can be approached by testing null hypotheses stating that the congruence coefficients between pairs of vectors of component loadings are equal to 1. Chan, Leung, Chan, Ho, and Yung (1999) proposed a bootstrap procedure for testing the hypothesis of perfect congruence between vectors of common factor loadings. We demonstrate that the procedure by Chan et al. is both theoretically and empirically inadequate for the application on principal components. We propose a modification of their procedure, which constructs the resampling space according to the characteristics of the principal component model. The results of a simulation study show satisfactory empirical properties of the modified procedure.

Using Rest's Four Component Model to Predict Applicant Cheating

2011 ◽  
Author(s):  
Lynn R. Hartmann ◽  
Kristie Lynn Campana ◽  
Lance Andrews
Keyword(s):  
Component Model ◽  
Four Component Model

Discussion on “The economic uses of cemented carbide and other high duty alloy tools” at the Birmingham Section of the Institution

1933 ◽  
Vol 12 (6) ◽  
pp. 252
Author(s):  
Groocock ◽  
J.H. Fletcher ◽  
H. Spinks ◽  
Rennie ◽  
Wormald ◽  
...  
Keyword(s):  
Cemented Carbide

Microboring of Fine Powder Cemented Carbide Using Diode-pumped Q-switched YAG Laser

2006 ◽  
Vol 40 (93) ◽  
pp. 21-28
Author(s):  
Yasuhiro OKAMOTO ◽  
Norio KATAOKA ◽  
Yoshiyuki UNO ◽  
Eiji YUASA ◽  
Shin-ichiro KUBOTA
Keyword(s):  
Fine Powder ◽  
Cemented Carbide ◽  
Yag Laser ◽  
Diode Pumped
Sign in / Sign up

Export Citation Format

Share Document