Interlayer bonding strength

Figure 7-18 The relationship between laminating density and the interlayer bonding strength of the laminated body.

Figure 7-20 The relationship between laminating conditions (temperature and pressure) and interlayer bonding strength (using acrylic resin as the binder).

According to Pearson (1972) the rhombohedral structure of these elements can be considered a distortion of a simple cubic structure in which the d2/d ratio would be 1. The decrease of the ratio on passing from As to Bi, and the corresponding relative increase of the strength of the X-X interlayer bond (passing from a coordination nearly 3, as for the 8 — eat rule, to a coordination closer to 6) can be related to an increasing metallic character. 

Sintered cutting tips or inserts containing c-BN can be brazed to a cemented carbide or other substrates. Brazing bond strength is increased by interlayers of various carbides, nitrides, or carbonitrides [268],... 

The structures with D = 3 (frameworks) are usually most stable mechanically, thermally, and chemically. The layered (D = 2) and chain (D = 1) structures, and especially structures with finite anions (D = 0) with similar bond strength and polarity, are more labile many of these may absorb water into the interlayer or interchain space, or hydrolyze to produce amorphous products or even be water-soluble. In addition, structures with D = 1 or 2 usually display strong anisotropy of the conductivity and/or thermal expansion (although some exceptions are possible). Multiple examples with D = 0, 2, and 3 are listed in Sections 7.4—7.6. 

The interlayer bond has a big effect on the physical and chemical properties of layer silicates. Bonding within the unit layers is much stronger than between adjacent unit layers. When the mineral is subjected to physical or thermal stress, it fractures first between the unit layers, along the basal plane. This is the reason for the flake-like shape of most macroscopic layer silicate crystals. Also, the stronger the interlayer bond, the greater the crystal growth in the c dimension before fracture. Hence, the size and shape of layer silicate crystals is a direct consequence of the strength of their interlayer bonds. 

Dissolves or swells in some solvents temperature and pressure limitations permeable to oxygen and carbon dioxide Interlayer bonding difficult slightly moisture permeable little compressive or tensile strength - creeps... 

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