JPS614949A - Discriminating method of indentation cracking in ceramics - Google Patents
Discriminating method of indentation cracking in ceramicsInfo
- Publication number
- JPS614949A JPS614949A JP12526384A JP12526384A JPS614949A JP S614949 A JPS614949 A JP S614949A JP 12526384 A JP12526384 A JP 12526384A JP 12526384 A JP12526384 A JP 12526384A JP S614949 A JPS614949 A JP S614949A
- Authority
- JP
- Japan
- Prior art keywords
- indentation
- indenter
- ceramics
- crack
- cracks
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007373 indentation Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 14
- 239000000919 ceramic Substances 0.000 title claims description 12
- 238000005336 cracking Methods 0.000 title abstract 5
- 239000003973 paint Substances 0.000 claims abstract description 8
- 230000003287 optical effect Effects 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000007796 conventional method Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/91—Investigating the presence of flaws or contamination using penetration of dyes, e.g. fluorescent ink
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/388—Ceramics
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、セラミックスにおける圧痕き裂゛表別方法に
係９、容易に圧痕き裂の検出及び識別することのできる
セラミックスの圧痕き裂識別方法に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a tabular method for indentation cracks in ceramics9, and a method for identifying indentation cracks in ceramics that can easily detect and identify indentation cracks. Regarding.
アルミナ、炭化ケイ素、♀化ケイ素等のセラミックの脆
性の度合を定量的に示す破壊靭性値の測定方法として、
平滑に仕上げられたセラミックスの表面にビッカース圧
子あるいはヌープ圧子を強制的に押込み、前記圧子の圧
痕および圧痕端部からき裂を形成させ、そのときの圧子
の押込み荷重、圧痕の大きさ、圧痕き裂の大きさおよび
硬度外とから求める圧痕法がある。さらに、前記の圧痕
き裂を有する試・倹片に外力を加えて、その破壊時の応
力を調べ、圧痕き裂の大きさと破壊応力から破壊靭性値
を求める方法がある。両者のいずれにおいても、正確な
破壊靭性値の測定のために圧痕き裂の長さを精度良く求
めることが不可欠である。As a method for measuring fracture toughness values that quantitatively indicate the degree of brittleness of ceramics such as alumina, silicon carbide, and silicon oxide,
A Vickers indenter or Knoop indenter is forcibly pushed into the smooth surface of ceramics, and a crack is formed from the indentation and the end of the indentation. There is an indentation method that determines the size and hardness of the surface. Furthermore, there is a method in which an external force is applied to the specimen having the indentation crack, the stress at the time of fracture is examined, and the fracture toughness value is determined from the size of the indentation crack and the fracture stress. In both cases, it is essential to accurately determine the length of the indentation crack in order to accurately measure the fracture toughness value.
このため第１図に示す従来法では、試験片表面を十分な
境面仕上げ（最大表面粗さ０．１μｍ以下）することが
必要であり、試験片の作製に多大な労力を要する欠点が
ある。寸だ、圧痕き裂の幅は非常に狭い（約０．２μｍ
以下）ため、光学顕微鏡では識別しにくい。したがって
、正確な到定か保証されない欠点がある。For this reason, the conventional method shown in Figure 1 requires a sufficient surface finish on the test piece surface (maximum surface roughness of 0.1 μm or less), which has the disadvantage of requiring a great deal of labor to prepare the test piece. . The width of the indentation crack is very narrow (approximately 0.2 μm)
(below), making it difficult to identify with an optical microscope. Therefore, there is a drawback that accurate arrival is not guaranteed.
本発明は上述の点に鑑みなされたもので、その目的とす
るところは、表面の十分な焼面仕上げをすることなくか
つ圧痕き裂を明瞭に出現させて、容易に圧痕き裂の長さ
が測定できるセラミックスの圧痕き裂識別方法を提供す
ることにある。The present invention has been made in view of the above-mentioned points, and its purpose is to easily reduce the length of the indentation crack by making the indentation crack appear clearly without having to sufficiently burn the surface. An object of the present invention is to provide a method for identifying indentation cracks in ceramics, which can measure indentation cracks in ceramics.
本発明は、平滑に仕上げた表面にビッカース圧子、ちる
いはヌープ圧子を押込み、前記圧子の圧痕の端部よりき
裂を発生させ、前記き裂の大きさを光学顕微鏡により識
別するセラミックスの圧痕き裂識別方法において、前記
平滑に仕上げだ表面に、前記圧子を押込む前にあらかじ
め非透明かつ有色な揮発性の塗料を薄く塗布し、乾燥後
、前記圧子を押込み、圧痕の端部に発生したき裂を光学
顕微鏡により識別することを特徴とするものである。The present invention involves indenting a ceramic indentation by injecting a Vickers indenter, chirui, or Knoop indenter into a smooth surface, generating a crack from the end of the indentation of the indenter, and identifying the size of the crack using an optical microscope. In the crack identification method, a non-transparent colored volatile paint is applied thinly to the smooth finished surface before the indenter is pushed in, and after drying, the indenter is pushed in to prevent cracks from forming at the end of the indentation. This method is characterized by identifying cracks that have formed using an optical microscope.
〔発明の実施例〕 以下、本発明の一実施例を第２図を参照して説明する。[Embodiments of the invention] An embodiment of the present invention will be described below with reference to FIG.
第２図は、本発明の手順を示したものである。セラミッ
クス試料の表面研摩の仕上げ程度は通常のダイヤモンド
砥石を使用した平面研削盤で容易に得られる最大表面粗
さＲ−ア一〇、８μｍであれば十分である。次に、平滑
に研摩された表面に、非透明かつ有色な揮発性の塗料を
薄く均一な厚さになるように塗布する。該塗料としては
油性の速乾性インキがある。該塗料の乾燥後、該塗料が
塗布された表面にビッカースあるいはヌープ圧子、を押
込み、該表面に圧痕および圧痕き裂を形成させる。その
後形成された圧痕および圧痕き裂の大きさの測定を実施
する。FIG. 2 shows the procedure of the present invention. It is sufficient to polish the surface of the ceramic sample to a maximum surface roughness R-A10 of 8 μm that can be easily obtained with a surface grinder using an ordinary diamond grindstone. Next, a thin, uniform coating of non-transparent, colored, volatile paint is applied to the smooth and polished surface. Such paints include oil-based quick-drying inks. After the paint has dried, a Vickers or Knoop indenter is pressed into the paint-applied surface to form indentations and indentation cracks on the surface. The size of the formed indentation and indentation crack is then measured.
本実施例によれば、光学顕微鏡による観察のみ−で圧痕
および圧痕き裂の大きさを容易に正確な測 一定が実施
できる効果がある。According to this embodiment, the size of an indentation and an indentation crack can be easily and accurately measured only by observation using an optical microscope.
本発明によれば、ビッカースあるいはヌープ圧子を押込
んで、圧痕および圧痕き裂を形成させるセラミックス試
料の表面仕上げ程度は最大表面粗さＲｍａｔが１μｍ以
下で満足される。このため、従来法におけるＲ□、、＜
０．１μｍの表面を得るだめのラッピングによる鏡面仕
上げを省略するととができるので、試料作成のための時
間と労力を従。According to the present invention, the surface finish of a ceramic sample into which a Vickers or Knoop indenter is pressed to form indentations and indentation cracks is satisfied when the maximum surface roughness Rmat is 1 μm or less. For this reason, R□ in the conventional method, , <
Since mirror finishing by lapping to obtain a 0.1 μm surface can be omitted, time and effort for sample preparation can be saved.
来の１／３に短縮する効果がある。It has the effect of shortening the time to 1/3 of the previous time.
この方法の特徴はセラミック部品から試験片を切り出す
ことなしに、任意の場所の破壊靭性値が得られる可能性
があることである。A feature of this method is that it is possible to obtain fracture toughness values at any location without cutting out test pieces from ceramic parts.
第１図は、従来法の手順図、第２図は本発明の一〇口 第 １ 図 Figure 1 is a procedure diagram of the conventional method, and Figure 2 is a diagram of the 10 steps of the present invention. Figure 1
Claims (1)
ープ圧子を押込み、前記圧子の圧痕の端部よりき裂を発
生させ、前記き裂の大きさを光学顕微鏡により識別する
セラミックスの圧痕き裂識別方法において、前記平滑に
仕上げた表面に、前記圧子を押込む前にあらかじめ非透
明かつ有色な揮発性の塗料を薄く塗布し、乾燥後、前記
圧子を押込み、圧痕の端部に発生したき裂を光学顕微鏡
により識別することを特徴とするセラミックスの圧痕き
裂識別方法。1. A method for identifying indentation cracks in ceramics in which a Vickers indenter or Knoop indenter is pressed into a smooth surface, a crack is generated from the end of the indentation of the indenter, and the size of the crack is identified using an optical microscope. Before pressing the indenter, a thin layer of non-transparent colored volatile paint is applied to the smooth surface, and after drying, the indenter is pressed in to remove any cracks that occur at the end of the indentation. A method for identifying indentation cracks in ceramics characterized by identification using an optical microscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12526384A JPS614949A (en) | 1984-06-20 | 1984-06-20 | Discriminating method of indentation cracking in ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12526384A JPS614949A (en) | 1984-06-20 | 1984-06-20 | Discriminating method of indentation cracking in ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS614949A true JPS614949A (en) | 1986-01-10 |
Family
ID=14905750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12526384A Pending JPS614949A (en) | 1984-06-20 | 1984-06-20 | Discriminating method of indentation cracking in ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS614949A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5860767U (en) * | 1981-10-21 | 1983-04-23 | トヨタ自動車株式会社 | Vehicle door opening/closing mechanism |
| JPS6375278A (en) * | 1986-09-13 | 1988-04-05 | 泰平電機株式会社 | Door opening and closing apparatus for vehicle |
| JP2015004535A (en) * | 2013-06-19 | 2015-01-08 | 独立行政法人産業技術総合研究所 | Fracture toughness measuring method of test piece, and mixed solution for fracture toughness measurement of test piece |
-
1984
- 1984-06-20 JP JP12526384A patent/JPS614949A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5860767U (en) * | 1981-10-21 | 1983-04-23 | トヨタ自動車株式会社 | Vehicle door opening/closing mechanism |
| JPS624012Y2 (en) * | 1981-10-21 | 1987-01-29 | ||
| JPS6375278A (en) * | 1986-09-13 | 1988-04-05 | 泰平電機株式会社 | Door opening and closing apparatus for vehicle |
| JP2015004535A (en) * | 2013-06-19 | 2015-01-08 | 独立行政法人産業技術総合研究所 | Fracture toughness measuring method of test piece, and mixed solution for fracture toughness measurement of test piece |
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