Dependence of static strength of large single crystals of synthetic diamond type and Ib octahedral habit after heat treatment on their size

This article focuses on the problem of using large single crystals of type Ib synthetic diamond in single crystal and drilling tools. According to the literature review for the use of large diamonds in drilling equipment relevant conditions. The is shown possible negative effects of the temperature load on the diamond single crystal. The is presented developed technique for estimating the static strength of large diamond single crystals. It has been shown that microcrystals in the form of octahedra and cubes are formed as a result of heat treatment on the surface of synthetic diamond single crystals. The results of studies of the strength of large single crystals of synthetic diamonds of millimeter size are shown. In contrast to the classical approach, when IIb crystals are used for the production of drilling equipment, we present Ib crystals because they are closer to natural diamond in terms of physical and mechanical properties. The static strength criterion was used to assess the strength. It has been shown that crystals with a size of 1000 ... 1100 μm have a higher value of static strength than crystals with a size of 1200 μm and larger.

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Characteristics of some inclusions contained in synthetic diamond single crystals

Materials Science and Engineering A ◽

10.1016/s0921-5093(00)01051-0 ◽

2000 ◽

Vol 293 (1-2) ◽

pp. 107-111 ◽

Cited By ~ 12

Author(s):

Long-Wei Yin ◽

Zeng-Da Zou ◽

Mu-Sen Li ◽

Yu-Xian Liu ◽

Jian-Jun Cui ◽

...

Keyword(s):

Single Crystals ◽

Synthetic Diamond ◽

Diamond Single Crystals

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Thermal expansion of synthetic diamond single crystals at low temperatures

Diamond and Related Materials ◽

10.1016/0925-9635(93)90238-w ◽

1993 ◽

Vol 2 (5-7) ◽

pp. 859-861 ◽

Cited By ~ 1

Author(s):

K. Haruna ◽

H. Maeta

Keyword(s):

Thermal Expansion ◽

Single Crystals ◽

Low Temperatures ◽

Synthetic Diamond ◽

Diamond Single Crystals

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Optical properties of synthetic diamond single crystals

Semiconductors ◽

10.1134/1.1755882 ◽

2004 ◽

Vol 38 (5) ◽

pp. 520-523 ◽

Cited By ~ 4

Author(s):

A. V. Mudryi ◽

T. P. Larionova ◽

I. A. Shakin ◽

G. A. Gusakov ◽

G. A. Dubrov ◽

...

Keyword(s):

Optical Properties ◽

Single Crystals ◽

Synthetic Diamond ◽

Diamond Single Crystals

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Experimental Study of the High Temperature Mechanical Behaviors of TLP Bonding of Two Ni-Base Single Crystals

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.297-300.1489 ◽

2005 ◽

Vol 297-300 ◽

pp. 1489-1494 ◽

Cited By ~ 3

Author(s):

T. Li ◽

Qing Yuan Wang ◽

Ai Qin Wang ◽

Z.X. Wen ◽

Zhu Feng Yue

Keyword(s):

Experimental Study ◽

High Temperature ◽

Single Crystal ◽

Single Crystals ◽

Base Material ◽

Static Strength ◽

Loading Conditions ◽

Mechanical Behaviors ◽

Tensile Direction ◽

Tlp Bonding

In this paper, the mechanical behavior of Ni-base single crystals joint created by TLP bonding is presented. Experimental study has been performed on the TLP single crystal under loading conditions of static uniaxial tension, creep and Three-points-bending (T-P-B) at temperature of 850 °C. Specimens made of the base material, Ni-base single crystal specimens without bonding, were also tested under the same loading conditions. The mechanical behaviors of TLP single crystal is compared to the behaviors of base material. It was found that the static strength of the TLP specimens with the boundary normal to the tensile direction was 63% of the strength of the base material. The creep strength and the fracture ductile strength was more than 57% and 55% of that of the single crystal base material, respectively. The macro and micro graphs of fracture surfaces of specimens indicated that the fracture modes of the samples were brittle fracture.

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Structure and hardness of octahedral natural diamond single crystals depending on the HPHT treatment conditions

Journal of Superhard Materials ◽

10.3103/s1063457612030033 ◽

2012 ◽

Vol 34 (3) ◽

pp. 166-172 ◽

Cited By ~ 4

Author(s):

A. N. Sokolov ◽

A. A. Shul’zhenko ◽

V. G. Gargin ◽

M. G. Loshak ◽

L. I. Aleksandrova ◽

...

Keyword(s):

Single Crystals ◽

Natural Diamond ◽

Treatment Conditions ◽

Diamond Single Crystals

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Frank dislocation loops related to vacancies in HPHT as-grown synthetic diamond single crystals

Scripta Materialia ◽

10.1016/s1359-6462(01)00983-6 ◽

2001 ◽

Vol 45 (1) ◽

pp. 13-17 ◽

Cited By ~ 3

Author(s):

Long-Wei Yin ◽

Mu-Sen Li ◽

Jian-Jun Cui ◽

Dong-Sheng Sun ◽

Zhao-Yin Hao

Keyword(s):

Single Crystals ◽

Synthetic Diamond ◽

Dislocation Loops ◽

Diamond Single Crystals

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Luminescent properties of nanoparticles created by laser ablation of natural diamond single crystals

10.1063/5.0061957 ◽

2021 ◽

Author(s):

E. F. Martynovich ◽

E. A. Ludina ◽

N. L. Lazareva ◽

N. V. Bryanskiy ◽

A. L. Rakevich ◽

...

Keyword(s):

Laser Ablation ◽

Single Crystals ◽

Natural Diamond ◽

Luminescent Properties ◽

Diamond Single Crystals

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Physical and Mechanical Properties of Single Crystals of Co-Al-W Based Alloys with L12 Single-Phase and L12/fcc Two-Phase Microstructures

MRS Proceedings ◽

10.1557/proc-1128-u06-07 ◽

2008 ◽

Vol 1128 ◽

Cited By ~ 1

Author(s):

Haruyuki Inui ◽

Katsushi Tanaka ◽

Kyosuke Kishida ◽

Norihiko L. Okamoto ◽

Takashi Oohashi

Keyword(s):

Mechanical Properties ◽

Single Crystal ◽

Single Crystals ◽

Yield Stress ◽

Liquid Helium ◽

Elastic Constants ◽

Single Phase ◽

Physical And Mechanical Properties ◽

Helium Temperature ◽

Two Phase

AbstractSingle-crystal elastic constants of Co3(Al,W) with the cubic L12 structure have been experimentally measured by resonance ultrasound spectroscopy at liquid helium temperature. The values of all the three independent single-crystal elastic constants and polycrystalline elastic constants of Co3(Al,W) experimentally determined are 15~25% larger than those of Ni3(Al,Ta) but are considerably smaller than those previously reported. Two-phase microstructures with cuboidal L12 precipitates being well aligned parallel to <100> and well faceted parallel to {100} are expected to form very easily in Co-base superalloys because of the large value of E111/E100 and cij of Co3(Al,W). This is indeed confirmed by experiment. Values of yield stress obtained for both [001] and [¯123] orientations of L12/fcc two-phase single crystals moderately decrease with the increase in temperature up to 800°C and then decrease rapidly with temperature above 800°C without any anomaly in yield stress. Slip on {111} is observed to occur for both orientations in the whole temperature range investigated.

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