ICS

81.060.30

CCS

Q30

中華人民共和國國家標準

GB/T44537—2024

精細陶瓷室溫斷裂韌性試驗方法

表面裂紋彎曲梁（SCF）法

Testmethodforfracturetoughnessoffineceramicsatroomtemperature—

Surfacecrackinflexure（SCF）method

[ISO18756：2003，Fineceramics（advancedceramics,advancedtechnical

ceramics）—Determinationoffracturetoughnessofmonolithicceramicsatroom

temperaturebythesurfacecrackinflexure（SCF）method,MOD]

2024-09-29發布2025-04-01實施

國家市場監督管理總局發布

國家標準化管理委員會

GB/T44537—2024

目次

前言

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Ⅲ

1

范圍

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1

2

規范性引用文件

······················································································

1

3

術語和定義

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1

4

符號

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2

5

原理

··································································································

3

6

儀器設備

······························································································

3

6.1

試驗機

···························································································

3

6.2

彎曲夾具

·························································································

4

6.3

外徑測量裝置

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4

6.4

硬度計

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4

6.5

顯微鏡

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5

6.6

染色滲透劑

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5

6.7

溫度測量裝置

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5

6.8

濕度測量裝置

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5

7

樣品

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5

7.1

樣品尺寸和樣品制備

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5

7.2

樣品數量

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5

8

試驗步驟

······························································································

6

8.1

預制裂紋

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6

8.2

樣品斷裂試驗

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9

8.3

裂紋尺寸測量

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9

8.4

環境影響

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10

8.5

評估R曲線行為（可選）

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10

8.6

參考材料（可選）

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11

9

結果計算

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11

10

試驗報告

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12

附錄A（資料性）環境因素影響的慢速裂紋擴展

···················································

13

附錄B（規范性）預裂紋的表征

·····································································

14

附錄C（資料性）用SCF方法進行R曲線行為評價

················································

19

附錄D（規范性）倒角修正

··········································································

21

參考文獻

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23

Ⅰ

GB/T44537—2024

前言

本文件按照GB/T1.1—2020《標準化工作導則第1部分：標準化文件的結構和起草規則》的規

定起草。

本文件修改采用ISO18756：2003《精細陶瓷（先進陶瓷、先進技術陶瓷）采用表面裂紋彎曲梁

（SCF）法測定精細陶瓷室溫斷裂韌性》。

本文件與ISO18756：2003的技術差異及原因如下：

—刪除了術語“斷裂韌性值”，以避免術語混淆不清（見ISO18756：2003中的3.3）；

—將SCF法測得的斷裂韌性的符號KIsc更改為KIc,SCF，以方便對斷裂韌性術語的理解（見

第4章）；

—用規范性引用的GB/T6569替換了ISO14704，以適應我國技術條件，增加可操作性（見6.2、

7.1.2、7.1.3）；

—增加了對試驗報告內容的要求，以增加可操作性，便于本文件的執行[見第10章的a）、b）、

c）、s）]。

本文件做了下列編輯性改動：

—為與現有標準協調，將標準名稱改為《精細陶瓷室溫斷裂韌性試驗方法

表面裂紋彎曲梁

（SCF）法》；

—將關于SCF法和單邊預裂紋梁法的區別和聯系的描述更改為注（見第1章，ISO18756：2003中

的第1章）；

—用資料性引用的GB/T23806替換了ISO15732（見第1章）；

—刪除了ISO18756：2003中的第1章的注；

—更改了術語“應力強度因子”的注（見3.1注1，ISO18756：2003中的注）；

—增加了術語“應力強度因子”的注（見3.1注2）；

—刪除了ISO18756：2003中3.3、7.1.2、8.1.3、8.1.8和8.3.4的注；

—增加了條標題（見6.1~6.8、8.1.1~8.1.10）；

—用資料性引用的GB/T1216替換了ISO3611（見6.3）；

—刪除了ISO18756：2003中8.1.1的注2，8.1.7.2的注3和8.4.3的注1、注2。

請注意本文件的某些內容可能涉及專利。本文件的發布機構不承擔識別專利的責任。

本文件由中國建筑材料聯合會提出。

本文件由全國工業陶瓷標準化技術委員會（SAC/TC194）歸口。

本文件起草單位：中國科學院上海硅酸鹽研究所、廣東省科學院新材料研究所、中廣核研究院有限

公司、寧波伏爾肯科技股份有限公司、國裝新材料技術（江蘇）有限公司、濟寧市質量計量檢驗檢測研

究院、山東工業陶瓷研究設計院有限公司、山東國瓷功能材料股份有限公司、西安鑫垚陶瓷復合材料股

份有限公司、中國國檢測試控股集團股份有限公司、武漢理工大學、新三思（深圳）實驗設備有限公

司、北京中天標科標準化技術研究院集團有限公司、東華大學、上海工程技術大學。

本文件主要起草人：王新剛、王小飛、葉云、薛佳祥、袁祥奕、曹艷芬、王銘、崔爽、劉洋、

吳永慶、熊禮俊、劉潔、蔣丹宇、陳常祝、鄒冀、萬德田、包亦望、胡麗、張海昇、吳利翔、鮑偉超、

呂一航、馬小民、李健、楊國銀、付穎、張國軍、袁建輝、高建華、李蕾。

Ⅲ

GB/T44537—2024

精細陶瓷室溫斷裂韌性試驗方法

表面裂紋彎曲梁（SCF）法

1范圍

本文件描述了采用表面裂紋彎曲梁（SCF）法測定精細陶瓷室溫斷裂韌性的試驗方法。

本文件既適用于具有平坦或上升裂紋擴展阻力曲線的材料，也適用于單相陶瓷、晶須（或）顆粒增

強的復相陶瓷材料。

本文件不適用于連續纖維增強的陶瓷基復合材料。

注：本文件的表面裂紋彎曲梁（SCF）法與GB/T23806[2]的單邊預裂紋梁法類似，區別是通過不同方法制備預裂

紋，本方法制備的預裂紋尺寸較小。這兩種方法對于具有平坦R曲線的材料測試結果相近。

2規范性引用文件

下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中，注日期的引用文

件，僅該日期對應的