Silicon Nitride Cutting Tools

Baldoni, J.G.

doi:10.1016/b978-0-8155-1355-1.50016-8

Cited by 4 publications

(3 citation statements)

References 33 publications

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“…Conventionally, Al 2 O 3 -based ceramic tool materials were strengthened and toughened by the addition of micro-sized particles like TiC, TiN, ZrO 2 , (W, Ti)C, Ti(C, N), TiB 2 , SiC or SiC whiskers [1][2]. Between several techniques for improve mechanical properties of composites addition of low percent of nanosized second phase particles within the matrix grains and on the grain boundaries promote significantly increase in flexural strength but slight increase in fracture toughness [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Sintering Study of Al2O3/NbC/Wc Micro-Nanocomposite

Trombini

Tonello

Santos

et al. 2012

MSF

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Ceramic materials based on alumina are considered excellent for produce cutting tools used to machining hard metals. However, low mechanical strength and toughness presented by these materials limit their application. Traditionally particles, such as TiC, TiN and ZrO2, are added to the alumina matrix to improve their mechanical properties, increasing the range of applications. Recent studies have shown that the addition of particles of different sizes in alumina matrix can promote simultaneous increase in mechanical strength and tenacity. In this work sintering behavior of Al2O3micro-nanocomposite containing nanometric particles of NbC and micrometric particles of WC, was studied by dilatometry using heating rate of 20°C/min up to 1800°C. The addition of carbides in alumina matrix is prejudicial to sintering causing an increase in temperature of shrinkage.

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Section: Introductionmentioning

confidence: 99%

Sintering Study of Al2O3/NbC/Wc Micro-Nanocomposite

Trombini

Tonello

Santos

et al. 2012

MSF

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“…However, the intrinsic drawbacks of alumina-based cutting tools, such as lower fracture toughness and lower thermal shock resistance usually make them more susceptible to excessive chipping or fracture, especially under interrupted machining condition. Alumina-based ceramic tool materials were usually reinforced with ZrO 2 , TiC, TiN, (W,Ti)C, SiC, Ti(C,N), SiC whiskers, TiB 2 [1,4] . The toughening and strengthening mechanisms of these ceramic composites are phase transformation toughening, whisker toughening, particle dispersion strengthening/toughening, synergistic toughening.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Mechanical Properties of Nano-Al2O3 Based Composite Ceramic Tool Material

Fang

et al. 2011

AMR

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The Al2O3(nm)/SiC（μm）/Al2O3（μm）ceramic tool materials were fabricated by the hot-pressing technique. Effect of the compositions on microstructure and mechanical properties is investigated. With nano-particles content decreasing, the flexural strength increased and fine grains can be obtained. When the nano-alumina content is 60wt%, the grain of this sample is fine, the Vickers hardness and flexural strength are 16.24 GPa and 678 MPa, respectively.

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“…The SiC whiskerreinforced alumina cutting tool produces a twofold increase in toughness relative to monolithic alumina. The aerospace industry considers it to be the state-of-the-art cutting tool material for rough machining of Ni-based superalloys (Baldoni and Buljan, 1988). However, it is chemically unsuitable for machining ferrous alloys (Billman et al, 1988) because of dissolution of the carbon of the matrix into the iron.…”

Section: Ceramic-matrix Composites Fabricationmentioning

confidence: 99%

Beam Technologies for Integrated Processing

1992

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Public reporting burden for ths collectiom of information i estimated to average 1 hour per response. icluing the time for reviewing humuctiom. searching existing data solutions. gathering and maintaining the data needed. and correlating ad reviewing the collection of infonmation. 92-17504-. 04The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance.This report has been reviewed by a group other than the authors according to procedures approved by a Report Review Committee consisting of members of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine.The National Academy of Sciences is a private, nonprofit, self-perpetuating society of distinguished scholars engaged in scientific and engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of the charter granted to it by the Congress in 1863, the Academy has a mandate that requires it to advise the federal government on scientific and technical matters. Dr. Frank Press is president of the National Academy of Sciences.The National Academy of Engineering was established in 1964, under the charter of the National Academy of Sciences, as a parallel organization of outstanding engineers. It is autonomous in its administration and in the selection of its members, sharing with the National Academy of Sciences the responsiblity for advising the federal government. The National Academy of Engineering also sponsors engineering programs aimed at meeting national needs, encourages education and research, and recognizes the superior achievements of engineers. Dr. Robert M. White is president of the National Academy of Engineering.The Institute of Medicine was established in 1970 by the National Academy of Sciences to secure the services of eminent members of appropriate professions in the examination of policy matters pertaining to the health of the public. The Institute acts under the responsibility given to the National Academy of Sciences by its congressional charter to be an advisor to the federal government and, upon its own initiative, to identify issues of medical care, research, and education. Dr. Kenneth I. Shine is president of the Institute of Medicine.The National Research Council was organized by the National Academy of Sciences in 1916 to associate the broad community of science and technology with the Academy's purposes of furthering knowledge and advising the federal government. Functioning in accordance with general policies determined by the Academy, the Council has become the principal operating agency of both the National Academy of Sciences and the National Academy of Engineering in provi...

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Silicon Nitride Cutting Tools

Cited by 4 publications

References 33 publications

Sintering Study of Al<sub>2</sub>O<sub>3</sub>/NbC/Wc Micro-Nanocomposite

Sintering Study of Al<sub>2</sub>O<sub>3</sub>/NbC/Wc Micro-Nanocomposite

Fabrication and Mechanical Properties of Nano-Al<sub>2</sub>O<sub>3</sub> Based Composite Ceramic Tool Material

Beam Technologies for Integrated Processing

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