The experimental results showed that the sintering mainly happened at the course of heating-up period, and the changing trend of heating-up and shrinkage curve of TiAl and TiC/TiAl composites is consistent.
General analysis of the hydration products and the autogenous shrinkage curve shows that the autogenous shrinkage is correlated closely with the formation of AFt. Because the deformation caused by the crystal transform reaction from AFt to AFm could supplement the shrinkage, the large amount of AFt produced in the early hydration could remarkably improve the autogenous shrinkage of paste.
The heat shrinkage curve of polyethylene co-squeezed film was determined and the influence of heat shrinkage on heat-sealing performance of the film was discussed.
The temperature upper limit was determined with 1st stage temperature shrinkage curve of the film,which can ensure the heat-sealing strength and reduce the heat-sealing time,reduce the damage rate,and ensure the beauty of the sealing line.
The shrinkage curve indicates that the expanding occurs first and then shrinking, and the densification occurs mainly at 800-850℃ after the solid reaction.
Besides the unimodal distribution of pore sizes, the linear shrinkage curve of a powder compact exhibits several inflexions indicating different rates of densification up to 1600°C.
Crack width, depth, spacing, volume, and tortuosity of the crack network are estimated by using the shrinkage curve of the soil and a water content profile.
Applications of the model include estimates of crack width, cross-sectional area, and volume in clay soils, given a knowledge of the water content profile and the shrinkage curve of the clay soil matrix.
In order to understand the effect of heat treatment upon the collapse. of Eucalyptus wood,moisture content- shrinkage curves are measured and drawn in this paper by means of drying at constant temperature and various humidity for treated and untreated Eucalyptus viminalis、E. tereticornis and E.camaldulensis. The result shows that whether heat treated or not,E. viminalis and E.tereticornis have the typical"collapse pattern"moisture content -shrinkage curve.For heat treated timber of ...
In this paper. a series of the sintering shrinkage curve of the glass particle were used to calculate the activation energy of the sintering of the base glasses. The factors whichaffected the sintering process of the glasses were discussed. And the optimum sintering system was obtained.
The paper deals with autogenous shrinkage of concrete with mineral admixture(SCA), which is composed of ultra\|fine slag, calcined kaolin and auxiliary agent in optimum compatibility and was used to prepare HPC instead of single ultrafine slag(SA). The experimental results show that SCA could either restrain the early autogenous shrinkage of paste or improve the prolonged shrinkage of concrete. General analysis of the hydration products and the autogenous shrinkage curve shows...