Characterization of nanolayers at TiAl diffusion bonds

An Atomistic Study of Interfacial Diffusion in Lamellar TiAl Alloys

In this paper we investigate self-diffusion of Ti and Al along interfaces present in the lamellar L10 TiAl by atomistic computer modeling. The interactions between the atoms are described by centralforce many-body potentials. The approach adopted is similar to that used in earlier atomistic modeling of bulk diffusion in TiAl [1, 2]. Both the formation and migration of vacancies is examined. The...

Convertible Bonds in a Defaultable Diffusion Model

Kissing Bonds in Diffusion Bonded Parts

The widespread application of diffusion bonding has been hindered, in part, by concems over kissing bonds. Kissing bonds are generally considered to be conditions where a bond has little or no strength and the concem is that such conditions might escape detection. At Rohr we differentiate between an intimate contact disbond (which has no bond between the surfaces but is detectable by careful ul...

Perpetual convertible bonds in jump-diffusion models

A convertible (callable) bond is a security that the holder can convert into a specified number of underlying shares. In addition, the issuer can recall the bond, paying some compensation, or force the holder to convert it immediately. We give an explicit solution to the corresponding optimal stopping game in the context of a reduced form model driven by a Brownian motion and a compound Poisson...

Visibility of dichalcogenide nanolayers.

Dichalcogenides with the common formula MX(2) are layered materials with electrical properties that range from semiconducting to superconducting. Here, we describe optimal imaging conditions for the optical detection of ultrathin, two-dimensional dichalcogenide nanocrystals containing single, double and triple layers of MoS(2), WSe(2) and NbSe(2). A simple optical model is used to calculate the...