Ndigui Billong
University of Yaoundé I
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Publication
Featured researches published by Ndigui Billong.
Advances in Applied Ceramics | 2008
Elie Kamseu; D.N. Boccaccini; Antonella Sola; Antonino Rizzuti; Cristina Leonelli; U. Chinje Melo; Ndigui Billong
Abstract A complete investigation on the sintering behaviour, involving ceramic transformation, of volcanic ash is reported. Sintering and softening points, vitrification and fusion of finely ground powders of volcanic ash were obtained by hot stage microscope observation. Then, a suitable thermal cycle, which matches the better microstructure and mechanical properties, has been performed. The low quartz content of the final product, the relative high density together with the particular structural complexity of the matrix consequence of the interlocking of various crystalline phases conferred to fired volcanic ash relevant ceramic characteristics. Nucleation and microcrystallisation of pyroxene together with oxidation and cation enrichment are indicated as the main sintering mechanism of fired volcanic ash. Differently from conventional vitrified ceramics, i.e. quartz and mullite in vitreous matrix, the microstructure of the fired products presents spinel, anorthite, diopside, enstatite, pyroferrite, fayalite and hedenbergite crystals embedded in the high viscous liquid phase resulting in dense and resistant materials.
Construction and Building Materials | 2009
Ndigui Billong; U.C. Melo; F. Louvet; Daniel Njopwouo
Construction and Building Materials | 2011
Ndigui Billong; U.C. Melo; E. Kamseu; J.M. Kinuthia; Daniel Njopwouo
Cement & Concrete Composites | 2009
Ndigui Billong; U.C. Melo; Daniel Njopwouo; F. Louvet; J.P. Bonnet
Silicates Industriels | 2005
U. Chinje Melo; Ndigui Billong
Materials Sciences and Applications | 2013
Ndigui Billong; U.C. Melo; Daniel Njopwouo; F. Louvet; Jean Pierre Bonnet
Materials Sciences and Applications | 2017
Lynn Myllyam Beleuk à Moungam; Hawa Mohamed; Elie Kamseu; Ndigui Billong; Uphie Chinje Melo
Applied Clay Science | 2017
Patrick N. Lemougna; Kai-tuo Wang; Qing Tang; Elie Kamseu; Ndigui Billong; U.P. Chinje Melo; Xue-min Cui
Silicates Industriels | 2008
Ndigui Billong; U. Chinje Melo; Maurice Kor Ndikontar
Resources Conservation and Recycling | 2018
Patrick N. Lemougna; Kai-tuo Wang; Qing Tang; Aubin Nzeukou; Ndigui Billong; U. Chinje Melo; Xue-min Cui