1991
DOI: 10.1002/ange.19911031207
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Siliciumnitrid ‐ vom Pulver zum keramischen Werkstoff

Abstract: Aufgrund der günstigen Eigenschaftskombination von Siliciumnitridkeramik ‐ hohe Festigkeit bei hohen Temperaturen, Korrosions‐ und Verschleißbeständigkeit, große Härte und geringe Dichte ‐ist dieser Werkstoff von großem Interesse für Hochleistungsanwendungen im Maschinen‐, Motoren‐ und Turbinenbau. Die Basis der Siliciumnitridkeramik bilden hochwertige Si3N4‐Pulver, die nach der Formgebung zum Fertigteil gesintert werden. Dieser Beitrag berichtet über die Anforderungen, die an keramikgeeignete Si3N4‐Pulver ges… Show more

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Cited by 90 publications
(58 citation statements)
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“…Li 3 N was purchased from Alfa Aesar (99.4 %), Ca and Sr from Sigma-Aldrich (99.99 %) and Si(NH) 2 was synthesized according to the literature. [13] For the reactions, tantalum crucibles (wall thickness 0.5 mm, internal diameter 10 mm, length 300 mm) were cleaned in a mixture of HNO 3 (conc.) and HF (40 %).…”
Section: Methodsmentioning
confidence: 99%
“…Li 3 N was purchased from Alfa Aesar (99.4 %), Ca and Sr from Sigma-Aldrich (99.99 %) and Si(NH) 2 was synthesized according to the literature. [13] For the reactions, tantalum crucibles (wall thickness 0.5 mm, internal diameter 10 mm, length 300 mm) were cleaned in a mixture of HNO 3 (conc.) and HF (40 %).…”
Section: Methodsmentioning
confidence: 99%
“…Mixtures of SrCO 3 (Philips Lighting Components, 99.9%), Si 3 N 4Àx (NH) 3/2x (x % 1, made by thermal decomposition of Si(NH) 2 as described in Ref. [14], O contento2 wt%), and the rare earth dopants Eu 2 O 3 (Alfa Aesar, REacton 99.999%) or Yb 2 O 3 (Auer-Remy, 99.99%) were prepared by ball milling, and fired for 2-4 h at 1200-1500 1C in a reducing atmosphere (H 2 /N 2 ) in a tube furnace. After milling the raw product, powders were washed with water and isopropanol.…”
Section: Experimental Methodsmentioning
confidence: 99%
“…Chemical vapor-deposited silicon ceramic films are prepared by gas-phase reactions containing a silicon compound, for example as silane (SiH 4 ) or silicon tetrachloride (SiCl 4 ), and a nitrogen, carbon, or boron precursor, for example, ammonia in case of silicon nitride (Si 3 N 4 ) formation [1]. Such ceramic films or particles have significant advantages such as extreme hardness, oxidation inertness, and mechanical strength at high temperature, and are extensively used for electronic and nonelectronic (coatings, thermal insulation, combustion chambers, etc .…”
Section: Introductionmentioning
confidence: 99%