新型洗涤剂助剂——亚胺磺酸盐代磷复配洗衣粉的研究

作为一种洗涤剂助剂，亚胺磺酸盐具有良好的物理化学性质，表面活性及复配性能。试验表明，它的去污力可与三聚磷酸钠相当。通过试验设计和方差分析，筛选出以亚胺磺酸盐取代三聚磷酸钠的优化的复配洗衣粉的配方组成。样品的主要性能（去污力）达到或超过国内市售产品。     

函数RM展开式和CRM展开式的图形转换法

在研究或、符合代数系统的基础上，本文根据逻辑函数bj系数和dj系数的关系，提出了bj图和dj图之间的图形转换方法，并举例说明转换过程。该方法揭示了bj图和dj图的内在联系，具有简洁、直观的特点。     

Single track formation in selective laser melting of metal powders

Selective laser melting (SLM) is a powder-based additive manufacturing capable to produce parts layer-by-layer from a 3D CAD model. Currently there is a growing interest in industry for applying this technology for generating objects with high geometrical complexity. To introduce SLM process into industry for manufacturing real components, high mechanical properties of final product must be achieved. Properties of manufactured parts depend strongly on each single laser-melted track and each single layer. In this study, effects of the processing parameters such as scanning speed and laser power on single tracks formation are explored. Experiments are carried out at laser power densities (0.3–1.3) × 10⁶ W/cm² by cw Yb-fiber laser. Optimal ratio between laser power and scanning speed (technological processing map) for 50 μm layer thickness is determined for stainless steels (SS) grade 316L (−25 μm) and 904L (−16 μm), tool steel H13 (−25 μm), copper alloy CuNi10 (−25 μm) and superalloy Inconel 625 (−16 μm) powders. A considerable negative correlation is found between the thermal conductivity of bulk material and the range of optimal scanning speed for the continuous single track sintering.     

Laser melting of uranium carbides

In the context of the material research aimed at supporting the development of nuclear plants of the fourth Generation, renewed interest has recently arisen in carbide fuels. A profound understanding of the behaviour of nuclear materials in extreme conditions is of prime importance for the analysis of the operation limits of nuclear fuels, and prediction of possible nuclear reactor accidents. In this context, the main goal of the present paper is to demonstrate the feasibility of laser induced melting experiments on stoichiometric uranium carbides; UC, UC_1.5 and UC₂. Measurements were performed, at temperatures around 3000 K, under a few bars of inert gas in order to minimise vaporisation and oxidation effects, which may occur at these temperatures. Moreover, a recently developed investigation method has been employed, based on in situ analysis of the sample surface reflectivity evolution during melting. Current results, 2781 K for the melting point of UC, 2665 K for the solidus and 2681 K for the liquidus of U₂C₃, 2754 K for the solidus and 2770 K for the liquidus of UC₂, are in fair agreement with early publications where the melting behaviour of uranium carbides was investigated by traditional furnace melting methods. Further information has been obtained in the current research about the non-congruent (solidus-liquidus) melting of certain carbides, which suggest that a solidus-liquidus scheme is followed by higher ratio carbides, possibly even for UC₂.