Crack-Free Processing of Hot-Pressed Silicon Nitride Ceramics using Pulsed YAG Laser

スポンサーリンク

概要

• 論文の詳細を見る

• It is difficult to eliminate recast layers and cracks in laser-machining caramics. These defects significantly detract from the excellent properties of ceramics. This paper describes the feasibility of a crack-free processing method for hot-pressed silicon nitride (Si_3N_4) ceramics using a yttrium aluminum garnet (YAG) laser. The Q-switched YAG laser pulses controlled at below 500 ns in duration and 10 kHz in repetition rate are effective for the purpose of crack-free machining of Si_3N_4 ceramics because the thermal stress is most likely localized only in the laser-heated shallow area. The integrity of the crack-free surface is evaluated by the fracture strength and residual stress. The strength of laser-processed test pieces is reduced by 10 to 20% compared with diamond-ground ones because the high residual compression layer generated during grinding is removed.

• 一般社団法人日本機械学会の論文
• 1991-03-15

著者

• MORITA Noboru

  Department of Chemistry, Graduate School of Science, Tohoku University

• Watanabe Takehiro

  Department of Gene Diagnostics and Therapeutics, Research Institute, International Medical Center of

• Morita Noboru

  Department Of Mechanical Engineering Faculty Of Engineering Chiba University

• Watanabe T

  Nagoya Univ. Nagoya Jpn

• Morita Noboru

  Department Of Chemistry Graduate School Of Science Tohoku University

• Watanabe Takehiro

  Department Of Mechanical Engineering Faculty Of Engineering Chiba University

• Yoshida Y

  Department Of Mechanical Engineering Faculty Of Engineering Chiba University

• YOSHIDA Yoshitaro

  Department of Mechanical Engineering, Faculty of Engineering, Chiba University

• Watanabe Takehiro

  Department Of Electronics And Mechanical Engineering Chiba University

関連論文

• Periodontal Tissue Reaction to Mechanical Stress in Mice
• Improved Preparative Method for 1,2-Diaryl-3,4-diphosphinidenecyclobutenes and Its Application to the Studies of 1,2-Bis(arylthienyl)-3,4-diphosphinidenecyclobutenes
• Successful Isolation of a Chromosome 1 Region Affecting Blood Pressure, Stroke, and Glucose Tolerance In the Stroke-Prone Spontaneously Hypertensive Rat
• Identification of Quantitative Trait Loci for Cardiac Hypertrophy in Two Different Strains of the Spontaneously Hypertensive Rat
• Evaluation of genetic susceptibility for cardiac hypertrophy with relation to hypertension, sexual dimorphism, and genetic make-up
• Notch signaling in mandibular condylar cartilage development(Poster Session,The 16th Annual Meeting of the Society for Hard Tissue Regenerative Biology in Matsumoto Dental University)
• Periodontal tissue reaction to mechanical stress in mice(Poster Session,The 16th Annual Meeting of the Society for Hard Tissue Regenerative Biology in Matsumoto Dental University)
• Runx2 expression in mandibular condylar cartilage development(15thAnnual Meeting of the Society for Hard Tissue Regenerative Biology,Session 2)
• Impact of main bronchial lymph node involvement in pathological T1-2N1M0 non-small-cell lung cancer : multi-institutional survey by the Japan National Hospital Study Group for Lung Cancer
• A microstrip bandpass filter with ultra wide stopband using folded stepped-impedance resonators (マイクロ波)
• OE-287 Comprehensive investigation of quantitative trait loci for blood pressure and associated metabolic traits in the spontaneous hypertensive rat strains(Genetics/Genetically Engineered Models 2 (H) : OE36)(Oral Presentation (English))
• Evaluation of Gene-Gene Interaction for Hypertension and Associated Metabolic Traits in Reciprocal Crossbreeds Derived from Chromosome-1 Congenic Rats
• Crack-Free Processing of Hot-Pressed Silicon Nitride Ceramics Using a Pulsed YAG Laser : Fracture Strength and Residual Stress
• Crack-Free Processing of Hot-Pressed Silicon Nitride Ceramics using Pulsed YAG Laser
• Weldability of Aluminum with the YAG Laser and an Estimation of Weld Strength by Numerical Analysis
• A Thermolytic Azulene Synthesis from Dimethyl 4-Morpholino-3,3a,8,8a-tetrahydroazulene-5,6-dicarboxylates and Its 1-Substituted Derivatives
• Synthesis and Dynamic Stereochemistry of Azulene-Substituted 9-Fluorenyl, 9,10-Dihydro-10,10-dimethyl-9-anthryl, 10,11-Dihydro-5H-dibenzo[a,d]cyclohepten-5-yl, and 5H-Dibenzo[a,d]cyclohepten-5-yl Cations. Correlations of Stabilities of the Carbocations an
• Synthesis, Properties, and Redox Behaviors of Di- and Trications Composed of Di(1-azulenly)methylium Units Connected by p- and m-Phenylene and 1,3,5-Benzenetriyl Spacers
• Acid-Catalyzed Condensation of Azulenes with 9-Anthracenecarbaldehyde and the Synthesis of (9-Anthryl)di(1-azulenyl)methyl and (1-Azulenyl)[10-(1-azulenyl)-9-anthryl]methyl Hexafluorophosphates
• Decarbonylation Reaction of 1-Azulenecarbaldehydes under Mild Conditions. A Strategy for the Protection of 1- and/or 3-Position of Azulene Rings
• Synthesis and Properties of Extremely Stable Tris (6-methoxy-1-azulenyl)-methyl Cation and a Series of Di(1-azulenyl)phenylmethyl and (1-Azulenyl)diphenylmethyl Cations Stabilized by Methoxy Substituents
• Syntheses and Properties of Extremely Stable Di(1-azulenyl)phenylmethyl and (1-Azulenyl)diphenylmethyl Cations Having Dimethylamino Substituents on Their Phenyl Groups
• The Most Stable Methylcation. Tris (6-methoxy-1-azulenyl) Methyl Hexafluorephosphate
• Synthesis and Dynamic Stereochemistry of Di-1-azulenyl-(1- and 2-naphthyl) methyl Hexafluorophosphates. Clear Evidence of the One-Ring Flip Mechanism of a Molecular Propeller by Controlling the Flipping Ring
• Synthesis and Dynamic Stereochemistry of Tris(2-methyl-1-azulenyl)methyl Cation and the Corresponding Methane Derivative. Evidence That the Conjugative Effect Largely Contributes to the Transition State of the Ring Flipping
• Synthesis and Dynamic Stereochemistry of a Tri(1-azulenyl)methyl Cation Containing a Different Substitutent on Each Azulene Ring
• Synthesis and Dynamic Stereochemistry of Bis(3-methyl-1-azulenyl)(1-naphthyl)methyl Hexafluorophosphate. Clear Evidence of the One-Ring Flip Mechanism of Molecular Propeller by Controlling the Flipping Ring
• Syntheses of Azulene Analogues of Triphyenylmethyl Cation: Extremely Stable Hydrocarbon Carbocations and the First Example of a One-Ring Flip as the Threshold Rotation Mechanism for Molecular Propellers^1
• Dynamic Stereochemistry of Di(3-methyl-1-azulenyl)phenylmethyl Cation. Flip of One Azulene Ring as the Threshold Rotation Mechanism
• A Rare Case of Lung Cancer Associated with Renal Cell Cancer and Benign Histiocytoma of Bone
• Three-Dimensional Nanofabrication Utilizing Selective Etching of Silicon Induced by Focused Ion Beam Irradiation
• Deep Structure Fabrication of Silicon Utilizing High-Energy Ion Irradiation Followed by Wet Chemical Etching(M^4 processes and micro-manufacturing for science)
• OE-293 Genetic Analysis of Metabolic Syndrome in Rats(Genetics/Genetically Engineered Models 2 (H) : OE36)(Oral Presentation (English))
• The Suppression of Sloshing in a Liquid Tank by Means of a Reversed U-Tube
• Nano-order Rapid Patterning of Quartz Surface Using Focused Ion Beam(M^4 processes and micro-manufacturing for science)
• Detailed Investigation on the Possibility of Nanoparticles of Various Metal Elements for Surface-Assisted Laser Desorption/Ionization Mass Spectrometry
• MALDI-MS Analysis of Ultrasonic Degradations of Uniform PMMA
• Genetic Analysis of Multiple Risk Factor Syndrome in Rats
• Direct Microjoining of Copper Materials Using Laser Beams(Advanced Manufacturing Technology [I])
• Direct Micro-joining of Copper Materials with YAG Laser Beams(Laser processing (continued))
• Generation, Characterization and Some Reactions of 1, 1-Ethylene-1H-azulenium Ion
• Relationship between Contact Voltage Drop and Frictional Coefficient under High-current Sliding Contact
• Micromachinability of Silicon in Flowing Water using Fourth-harmonic Pulsed Nd:YAG Laser Beam and Estimation of the Shapes by Neural Network(Laser processing)
• Preparation of 4,7-Dibromobenzo[b]thiophene as a Versatile Building Block and Synthetic Application to a Bis(ethynylthienyl)oligoarene System
• Synthesis and Properties of Mono-, Bis-, Tris-, and Tetrakis[1,1,4,4-tetracyano-2-(1-azulenyl)-1,3-butadien-3-yl] Chromophores Connected to a Benzene Ring by Phenylethynyl-and 2-Thienylethynyl Spacers
• Safety and prognosis of limited surgery for octogenarians with non-small-cell lung cancer
• Numerical Simulation of Boundary Condition Dependence of Mask Pattern Placement Error by Finite Difference Method in Steady State
• The synthesis of a double-layered annulene with 10.PI.-rings. 1,1:2,2-bis([10]annulene-1,6-diyl)ethylene.
• Structure for the "biguaiazulene-3,3'-dione" and efficient preparation of 5-isopropyl-3,8-dimethyl-1,7-azulenedione.
• Synthesis and Solvatochromic Properties of Azulene-substituted Donor-Acceptor-type Polymethine Dyes
• The synthesis of macrocyclic diaza n-n'-fulvadiene derivatives.
• One-step synthesis of 1,4-diketones by nucleophilic reaction to tricarbonyl complexes of .ALPHA.,.BETA.-unsaturated ketones.

もっと見る 閉じる

スポンサーリンク