Introduction

Blau, PJ; Lawn, B. R.

doi:10.1520/stp32947s

Cited by 10 publications

(10 citation statements)

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“…As discussed below, some researchers have reported hardness values near or above bulk values even though the substrate is much softer and substrate effects should be substantial. Microhardness measurements are particularly susceptible to the effects of elastic recovery; however, the indent diagonal lengths are believed to be only moderately affected by the recovery process [247,262]. While accounting for modest elastic effects, nanoindentation may overestimate the hardness of highly elastic materials.…”

Section: I Cbn Filmsmentioning

confidence: 99%

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Review of advances in cubic boron nitride film synthesis

Mirkarimi¹,

McCarty²,

Medlin³

1997

Materials Science and Engineering: R: Reports

589

349

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Cubic boron nitride (cBN) has a number of highly desirable mechanical, thermal, electrical, and optical properties. Because of this, there has been an extensive worldwide effort to synthesize thin films of cBN. Film synthesis is difficult in that without significant levels of ion bombardment during growth, only sp2-bonded BN forms, not sp3-bonded cBN. Recently there has been considerable progress in improving the deposition techniques and cBN film quality. In addition, progress has been made in understanding how energetic deposition conditions can lead to cBN formation. However, unanswered questions remain and process improvements are still needed. In this paper we critically and comprehensively review recent developments in cBN film synthesis and characterization. First, the structures and stability of the BN phases and characterization techniques are described. Next, the key experimental parameters controlling cBN film formation and synthesis techniques are discussed. Following a review of microstructure, the proposed mechanisms of cBN formation and the observed mechanical and electrical properties of cBN films are analyzed. We conclude by highlighting the current impediments to the practical realization of cBN-film technology. 0 1997 Published by Elsevier Science S.A.

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Section: I Cbn Filmsmentioning

confidence: 99%

“…Bdk cBN Before discussing work on the plastic and elastic properties of cBN thin films, we briefly review the mechanical properties of bulk cBN. Generally, hardness is measured through microhardness or nanoindentation testing [246,247]. In Vickers or Knoop microhardness measurements, the size of the indent made at a known load is usually measured optically.…”

mentioning

confidence: 99%

Review of advances in cubic boron nitride film synthesis

Mirkarimi¹,

McCarty²,

Medlin³

1997

Materials Science and Engineering: R: Reports

589

349

View full text Add to dashboard Cite

show abstract

“…The catastrophic sequential slip failures resulting in the series of parallel lateral cracks indicate a brittle glass or ceramic material. [30] The radial cracks do not propagate very far from the indenter corners, with maximum observed ratio of indenter axis length to crack length of 2:1, although half of the indenter corners did not exhibit radial cracks. As the crack propagated, the film did not shatter and delaminate from the substrate.…”

Section: Film Adhesionmentioning

confidence: 91%

Deposition of Bio‐Integration Ceramic Hydroxyapatite by Pulsed‐Pressure MOCVD Using a Single Liquid Precursor Solution

Krumdieck

Reyngoud

Barnett

et al. 2010

Chemical Vapor Deposition

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Pulsed-pressure (PP) metal-organic(MO)CVD is used to deposit layers of calcium phosphate onto flat bio-medical grade titanium (Ti6Al4V) substrates. Inexpensive calcium lactate and trimethyl phosphate (TMP), combined in a methanol solution, forms the precursor. A range of precursor mixtures is studied by thermogravimetric analysis (TGA) to assess reaction pathways. The surface topography, morphology, composition, and crystallinity are studied over a range of deposition temperatures and precursor concentrations. The resulting films are analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Raman spectroscopy (RS), and micro-indentation. The films are continuous and the size of surface structures increases at higher temperatures and precursor concentration. The films consist of amorphous calcium phosphate in elemental Ca/P ratios similar to the standard bio-ceramic, hydroxyapatite (1.66).

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“…Blau et al 35) and Loubet et al 36) found that the energy ratio, E plastic =E total , is proportional to the depth ratio, r = m , in some materials. Here, we assume that the relationship between the energy ratio, E plastic =E total , and the depth ratio, r = m , can be expressed as…”

Section: Analysis Of Indentation Behaviormentioning

confidence: 99%

Microindentation of a Zr57Ti5Cu20Ni8Al10 Bulk Metallic Glass

et al. 2007

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Using microindentation technique, the indentation behavior of a Zr 57 Ti 5 Cu 20 Ni 8 Al 10 bulk-metallic glass is studied over a range of the indentation load from 200 mN to 5000 mN. For the indentation load larger than 1000 mN, the indentation load-depth curves during unloading display three regions, a) a fast unloading phase at the onset of unloading, b) a linear phase at which the indentation load is proportional to the indentation depth, and c) a slow unloading phase after the linear phase. The size of the linear region increases with the increase in the indentation load, and the slope is independent of the indentation load. The indentation hardness decreases slightly with the increase in the indentation load. The plastic energy dissipated in an indentation cycle is proportional to the 3/2 power of the indentation load. The effect of the indentation loading rate on the indentation behavior is discussed.

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Introduction

Cited by 10 publications

References 0 publications

Review of advances in cubic boron nitride film synthesis

Review of advances in cubic boron nitride film synthesis

Deposition of Bio‐Integration Ceramic Hydroxyapatite by Pulsed‐Pressure MOCVD Using a Single Liquid Precursor Solution

Microindentation of a Zr<SUB>57</SUB>Ti<SUB>5</SUB>Cu<SUB>20</SUB>Ni<SUB>8</SUB>Al<SUB>10</SUB> Bulk Metallic Glass

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