Dynamic Measurement of the HMX<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">β</mml:mi></mml:math>-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">δ</mml:mi></mml:math>Phase Transition by Second Harmonic Generation

Henson, B. F.; Asay, B. W.; Sander, Robert K.; Son, Steven F.; Robinson, Jeanne M.; Dickson, Peter

doi:10.1103/physrevlett.82.1213

Cited by 78 publications

(48 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example the characterization of surfaces using second harmonic generation (SHG) has been studied by Shen 13 and Marrucci et al 14 However, until recently, the use of SHG to quantify the polymorphic composition of a solid material had been limited to observing the formation of seed crystals in an otherwise liquid medium. 15 In 1999, Henson et al 16 published the first results where the polymorphic state of a solid material (octahydro-1,2,3,5,7-tetranitro-1,3,5,7-tetrazocine) was quantified by monitoring the intensity of the generated second harmonic. In this article we review and extend a theoretical model of the expected response given by various types of particle mixtures.…”

Section: Introductionmentioning

confidence: 99%

Partial Characterization of Different Mixtures of Solids by Measuring the Optical Nonlinear Response

Strachan

Lee

Rades

2004

Journal of Pharmaceutical Sciences

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Partial Characterization of Different Mixtures of Solids by Measuring the Optical Nonlinear Response

Strachan

Lee

Rades

2004

Journal of Pharmaceutical Sciences

View full text Add to dashboard Cite

“…However until recently the use of SHG to quantify the polymorphic composition of a solid material had been limited to observing the formation of seed crystals in an otherwise liquid medium [15]. In 1999 Henson et al [16] published the first results where the polymorphic state of a solid material (octahydro-1,2,3,5,7-tetranitro-1,3,5,7-tetrazocine) was quantified by monitoring the intensity of the generated second harmonic. In this paper we present experimental proof-of-principle that this method can distinguish differences in the phases of mixtures of two polymorphs of the pharmaceutical drug enalapril maleate, of mixtures of two crystalline forms of lactose and of mixtures of enalapril maleate form II with Polyvinylpyrrolidone (PVP).…”

Section: Introductionmentioning

confidence: 99%

Determination of the optical second harmonic response of pharmaceutical solid–solid mixtures

Strachan

Rades

Lee

2005

Optics and Lasers in Engineering

View full text Add to dashboard Cite

“…At 438 K, the β phase begins to transform to the δ phase, which has a hexagonal crystal structure, according to the Arrhenius kinetics. 49,50 At 521 K, the melting temperature, the δ phase is more stable than the β phase at any pressure. 51 Under certain conditions, cracking can play a significant role in the response of β-HMX 2, 17, 52, 53 and extensive analyses have been carried out to quantify the dissipation associated with fracture and post-fracture crack-face friction.…”

Section: Energetic Molecular Crystalsmentioning

confidence: 99%

Analysis of thermomechanical response of polycrystalline HMX under impact loading through mesoscale simulations

Hardin¹,

Rimoli²,

Zhou³

2014

AIP Advances

View full text Add to dashboard Cite

We investigate the response of polycrystalline HMX 3,5,3,5, under impact loading through a 3-dimensional mesoscale model that explicitly accounts for anisotropic elasticity, crystalline plasticity, and heat conduction. This model is used to quantify the variability in temperature and stress fields due to random distributions of the orientations of crystalline grains in HMX under the loading scenarios considered. The simulations carried out concern the response of fully dense HMX polycrystalline ensembles under impact loading at imposed boundary velocities from 50 to 400 m/s. The polycrystalline ensemble studied consists of a geometrically arranged distribution of bi-modally sized and shaped grains. To quantify the effect of crystalline slip, two models with different numbers of available slip systems are used, reflecting differing characterizations of the slip systems of the HMX molecular crystal in the literature. The effects of microstructure and anisotropy on the distribution of heating and stress evolution are investigated. The results obtained indicate that crystalline response anisotropy at the microstructure level plays an important role in influencing both the overall response and the localization of stress and temperature. The overall longitudinal stress is up to 16% higher and the average temperature rise is only half in the material with fewer potential slip systems compared to those in the material with more available slip systems. Local stresses can be as high as twice the average stresses. The results show that crystalline anisotropy induces significant heterogeneities in both mechanical and thermal fields that previously have been neglected in the analyses of the behavior of HMX-based energetic materials. C 2014 Author(s)

show abstract

Dynamic Measurement of the HMXβ-δPhase Transition by Second Harmonic Generation

Cited by 78 publications

References 10 publications

Partial Characterization of Different Mixtures of Solids by Measuring the Optical Nonlinear Response

Partial Characterization of Different Mixtures of Solids by Measuring the Optical Nonlinear Response

Determination of the optical second harmonic response of pharmaceutical solid–solid mixtures

Analysis of thermomechanical response of polycrystalline HMX under impact loading through mesoscale simulations

Contact Info

Product

Resources

About