Journal•ISSN: 0261-8028
Journal of Materials Science Letters
Springer Science+Business Media
About: Journal of Materials Science Letters is an academic journal. The journal publishes majorly in the area(s): Microstructure & Thin film. It has an ISSN identifier of 0261-8028. Over the lifetime, 11113 publications have been published receiving 123781 citations.
Topics: Microstructure, Thin film, Ceramic, Sintering, Inorganic compound
Papers published on a yearly basis
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1,631 citations
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690 citations
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TL;DR: In this paper, the authors presented a new mechanism to achieve a negative Poisson's ratio in a two-dimensional arrangement of rigid squares connected together at their vertices by hinges as illustrated in Fig. 1.
Abstract: Auxetic materials exhibit the very unusual properties of becoming wider when stretched and narrower when squashed [1], that is they have negative Poisson’s ratios. Apart from the pure scientific interest of having materials showing such an unconventional property, a negative Poisson’s ratio gives a material several other beneficial effects such as an increased shear stiffness, an increased plane strain fracture toughness and an increased indentation resistance. These properties make auxetics superior to conventional materials for many practical applications [1, 2]. In recent years several auxetics have been fabricated by modifying the microstructure of existing materials, including foams [2] and microporous polymers [3]. A number of molecular auxetics have also been proposed [4–9] one example being α-cristobalite [7]. The auxetic behavior in these materials can be explained in terms of their geometry and deformation mechanism. Thus, the hunt for new auxetic materials is frequently approached through searching for geometric features which may give such behavior [9, 10]. In this letter we present a new mechanism to achieve a negative Poisson’s ratio. This is based on an arrangement involving rigid squares connected together at their vertices by hinges as illustrated in Fig. 1. This may be viewed as a two dimensional arrangement of squares or as a projection of a particular plane of a three dimensional structure. This latter type of geometry is commonly found in inorganic crystalline materials [8, 9, 11]. Referring to Fig. 1, for squares of side length “l” at an angle θ to each other, the dimensions of the unit cell in the Oxi directions are given by:
604 citations
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375 citations
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TL;DR: In this paper, transmission electron microscopy (TEM) has been used in conjunction with DSC to study precipitate evolution in aluminium alloy 6061 and 6×××-series aluminium alloys.
Abstract: No detailed calorimetric study of precipitation in 6××× series aluminium alloys has been reported to date. In this study, transmission electron microscopy (TEM) has been utilized in conjunction with DSC to study precipitate evolution in aluminium alloy 6061
340 citations