Influence of sintering and sintering additives on the mechanical and microstructural characteristics of Si3N4/SiC wood cutting tools

Strehler, Claudia; Blugan, Gurdial; Ehrle, Bruno; Speisser, B.; Graule, Thomas; Kuebler, Jakob

doi:10.1016/j.jeurceramsoc.2010.04.007

Cited by 26 publications

(11 citation statements)

References 27 publications

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“…State-of-the-art tools are made from cemented carbide (WC-Co) because they can offer a good ratio of price and performance (73, 74). However, due to the rising cost of tungsten and cobalt materials, cutting tools made by alumina- or silicon nitride–based composite ceramics have attracted increasing interest (75-77). Whereas today's machine technology allows high-speed cutting, the speed of peripheral milling cutters with mounted cemented carbide tools is limited due to the high specific gravity and resulting high centrifugal forces of the WC-Co tools.…”

Section: Case Study 2: Injection Molding Technology Applied To Ceramimentioning

confidence: 99%

Issues in Nanocomposite Ceramic Engineering: Focus on Processing and Properties of Alumina-based Composites

Palmero

Kern

Sommer

et al. 2014

Journal of Applied Biomaterials & Functional Materials

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Ceramic nanocomposites, containing at least one phase in the nanometric dimension, have received special interest in recent years. They have, in fact, demonstrated increased performance, reliability and lifetime with respect to monolithic ceramics. However, a successful approach to the production of tailored composite nanostructures requires the development of innovative concepts at each step of manufacturing, from the synthesis of composite nanopowders, to their processing and sintering. This review aims to deepen understanding of some of the critical issues associated with the manufacturing of nanocomposite ceramics, focusing on alumina-based composite systems. Two case studies are presented and briefly discussed. The former illustrates the benefits, in terms of sintered microstructure and related mechanical properties, resulting from the application of an engineering approach to a laboratory-scale protocol for the elaboration of nanocomposites in the system alumina-ZrO2-YAG (yttrium aluminium garnet). The latter illustrates the manufacturing of alumina-based composites for large-scale applications such as cutting tools, carried out by an injection molding process. The need for an engineering approach to be applied in all processing steps is demonstrated also in this second case study, where a tailored manufacturing process is required to obtain the desired results.

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Section: Case Study 2: Injection Molding Technology Applied To Ceramimentioning

confidence: 99%

Issues in Nanocomposite Ceramic Engineering: Focus on Processing and Properties of Alumina-based Composites

Palmero

Kern

Sommer

et al. 2014

Journal of Applied Biomaterials & Functional Materials

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show abstract

“…However, the hot‐pressing route was not competitive for an industrial viability. The successful fabrication of these Si 3 N 4 /SiC cutting tools by pressing techniques and subsequent hot isostatic pressing was shown by Strehler et al . Partial crystallization of the intergranular phase was indispensible for good edge integrity .…”

Section: Introductionmentioning

confidence: 99%

Medium Density Fiberboard Machining and Wear Behavior of Injection‐Molded Ceramic Composite Wood Cutting Tools

Sommer

Talpeanu

Kern

et al. 2013

Int J Applied Ceramic Tech

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Wear behavior of four different ceramic composite cutting tools was studied in peripheral milling of medium density fiberboard. Tools were previously manufactured by near net-shape ceramic injection molding with subsequent debindering and sintering. Cutting edge rounding and recession were investigated for defined cutting parameters and distinct cutting distances. Cutting forces were measured dependent on tool material and feed travel. Wear characteristics of ceramic cutting tools were investigated by SEM. Ceramic injection-molded tools were successfully applied in wood-machining operations. Wear mechanisms changed with different ceramic composites used. Results of microchamfered ACY tools showed superior lifetime compared with standard WC-Co tools.

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“…a smaller grain size is advantageous for reducing the chipping of the cutting edge . However, the reduction of the grain size for these Si 3 N 4 /SiC composites is limited by the gas pressure‐sintering process . The hardness, which is around 16.5 MPa for all Si 3 N 4 /SiC composites, is a critical parameter in determining the wear rate of a tool.…”

Section: Resultsmentioning

confidence: 99%

“…Experiments by the authors showed that it is possible to produce Si 3 N 4 /SiC wood cutting tools by an industrially feasible near net‐shaping route including gas pressure sintering of knife‐like green bodies. A final post sintering treatment by hot isostatic pressing, which leads to a partial crystallization of the intergranular phase, is indispensable for good edge integrity . It was found that the bulk mechanical properties, such as strength, fracture toughness, and hardness cannot describe the quality of the Si 3 N 4 /SiC wood cutting tools.…”

Section: Introductionmentioning

confidence: 99%

Lifetime and Wear Behavior of Near Net Shaped Si₃N₄/SiC Wood Cutting Tools

Strehler

Ehrle

Weinreich

et al. 2012

Int J Applied Ceramic Tech

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The introduction of ceramics into the market of wood cutting tools has been difficult because of the generally low toughness of ceramics which causes brittle failure. That is why the improvement of mechanical performance of ceramics with potential to be used as cutting tools is important. The newly developed Si3N4/SiC wood cutting tools have a bending strength of 740 MPa, a fracture toughness of 5.4 MPam1/2, a hardness of 16.8 GPa and a grain size of 1 μm. These Si3N4/SiC tools were tested in a lifetime cutting trial on wood and showed twice as long lifecycles than standard tungsten carbide tools. Furthermore, the static corrosion resistance in tannic acid, the friction coefficients between wood and the tool material and the cutting forces were measured for both the ceramic composite and the tungsten carbide tools.

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Influence of sintering and sintering additives on the mechanical and microstructural characteristics of Si3N4/SiC wood cutting tools

Cited by 26 publications

References 27 publications

Issues in Nanocomposite Ceramic Engineering: Focus on Processing and Properties of Alumina-based Composites

Issues in Nanocomposite Ceramic Engineering: Focus on Processing and Properties of Alumina-based Composites

Medium Density Fiberboard Machining and Wear Behavior of Injection‐Molded Ceramic Composite Wood Cutting Tools

Lifetime and Wear Behavior of Near Net Shaped Si₃N₄/SiC Wood Cutting Tools

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Influence of sintering and sintering additives on the mechanical and microstructural characteristics of Si3N4/SiC wood cutting tools

Cited by 26 publications

References 27 publications

Issues in Nanocomposite Ceramic Engineering: Focus on Processing and Properties of Alumina-based Composites

Issues in Nanocomposite Ceramic Engineering: Focus on Processing and Properties of Alumina-based Composites

Medium Density Fiberboard Machining and Wear Behavior of Injection‐Molded Ceramic Composite Wood Cutting Tools

Lifetime and Wear Behavior of Near Net Shaped Si3N4/SiC Wood Cutting Tools

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Product

Resources

About

Lifetime and Wear Behavior of Near Net Shaped Si₃N₄/SiC Wood Cutting Tools