Mechanical behaviour and fracture mechanism of flux grown holmium orthoferrite single crystals

Bhat, Monita; Kaur, Balwinder; Bamzai, K. K.; Kotru, P. N.; Wanklyn, B.M.

doi:10.1016/j.jpcs.2004.03.008

Cited by 11 publications

(5 citation statements)

References 30 publications

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“…Brittleness is an important property of the crystal which determines its fracture without any appreciable deformation. It is expressed in terms of brittleness index [25]. Brittleness index was calculated using the formula B i ¼ H v /K c as 2.707 Â 10 À3 m À1/2 [26].…”

Section: Resultsmentioning

confidence: 99%

Growth and characterization of an organic nonlinear optical crystal: Glycinium trichloroacetate

Moeck¹,

Ramasamy²

2012

Materials Chemistry and Physics

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Section: Resultsmentioning

confidence: 99%

Growth and characterization of an organic nonlinear optical crystal: Glycinium trichloroacetate

Moeck¹,

Ramasamy²

2012

Materials Chemistry and Physics

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“…The most searched properties for glass–ceramics are certainly associated with superior mechanical properties, which are illustrated here by microhardness H v and fracture toughness K c . Figure 4(a) shows the indentation impressions inflicted on the surfaces of GC0 and GC3 samples with the applied load of 100 g for 10 s. The values of mcirohardness H v (kg/mm 2 ) at the load can be calculated using the following expression 14 : where P is the applied load and d is the average diagonal length of the indentation mark. For the crack measurements, only well‐defined cracks were considered.…”

Section: Resultsmentioning

confidence: 99%

“…The crack length was measured from the center of the indentation mark up to the tip of the crack. The fracture toughness K c (g/μm 3/2 ) can be calculated using the following relationship 14 : where the constant k =1/7 for the Vichers indenter, c is the mean crack length, and a is the mean half‐diagonal length of the square indentation. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Phase Separation Inducing Controlled Crystallization of GeSe₂–Ga₂Se₃–CsI Glasses for Fabricating Infrared Transmitting Glass–Ceramics

Liu

Tang

et al. 2009

Journal of the American Ceramic Society

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Infrared transmitting glass-ceramics based on the selected glass of 65GeSe 2 -25Ga 2 Se 3 -10CsI were obtained by a two-stage heat-treatment method. Results of X-ray diffraction and scanning electronic microscopy indicated that droplet-like nanoparticles containing cubic Ga 2Àd Ge d Se 3 crystals are homogeneously generated in the glass-ceramics and that the whole glassceramic process is composed of phase separation, nucleation, and crystal growth. Evolutions of the optical and mechanical properties of glass-ceramics versus annealing time at the firststage heat treatment were also investigated. Compared with the parent glass, the fabricated glass-ceramics show considerably enhanced fracture toughness, practicable infrared transparence, and microhardness, which confer them with considerable competitive advantages over currently used infrared materials.

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“…Brittleness is an important property of the crystal which determines its fracture without any appreciable deformation. It is expressed in terms of brittleness index [14]. Brittleness index was calculated using the formula, Bi = Hv/Kc as 6.77 x 10 -3 m -1/2 for LPP and 5.74 x 10 -3 m -1/2 [15].…”

Section: Figure 6 Indentation Image Observed In La5 : Lppmentioning

confidence: 99%

Synthesis, Growth and Characterisation of Nonlinear Optical La-doped L-Prolinium Picrate Single Crystals

Gurumurthi¹,

Murugakoothan²

2018

IJCTR

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A nonlinear optical material L-Prolinium Picrate and Lanthanum doped L-Prolinium Picrate were synthesized and grown as single crystals by slow evaporation method. The grown crystals were subjected to structural, elemental, thermal, optical, mechanical and dielectric studies. The structural analysis reveals that pure LPP and La doped L-Prolinium Picrate belongs to the monoclinic crystallographic system with space group P 21 . Optical transparency of the grown crystals was investigated by UV-vis-NIR spectrum. The thermal analyses reveal that La doped L-Prolinium Picrate is thermally stable up to 188°C. The dielectric constant and dielectric loss of the crystals were studied as a function of frequency. The nonlinear optical property of the doped crystal was confirmed by the Kurtz-powder second harmonic generation test and the result is compared with pure L-Prolinium Picrate. Mechanical strength of the crystals was also carried out by Vicker's micro hardness test.

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Mechanical behaviour and fracture mechanism of flux grown holmium orthoferrite single crystals

Cited by 11 publications

References 30 publications

Growth and characterization of an organic nonlinear optical crystal: Glycinium trichloroacetate

Growth and characterization of an organic nonlinear optical crystal: Glycinium trichloroacetate

Phase Separation Inducing Controlled Crystallization of GeSe₂–Ga₂Se₃–CsI Glasses for Fabricating Infrared Transmitting Glass–Ceramics

Synthesis, Growth and Characterisation of Nonlinear Optical La-doped L-Prolinium Picrate Single Crystals

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Mechanical behaviour and fracture mechanism of flux grown holmium orthoferrite single crystals

Cited by 11 publications

References 30 publications

Growth and characterization of an organic nonlinear optical crystal: Glycinium trichloroacetate

Growth and characterization of an organic nonlinear optical crystal: Glycinium trichloroacetate

Phase Separation Inducing Controlled Crystallization of GeSe2–Ga2Se3–CsI Glasses for Fabricating Infrared Transmitting Glass–Ceramics

Synthesis, Growth and Characterisation of Nonlinear Optical La-doped L-Prolinium Picrate Single Crystals

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Phase Separation Inducing Controlled Crystallization of GeSe₂–Ga₂Se₃–CsI Glasses for Fabricating Infrared Transmitting Glass–Ceramics