GB/T 44537-2024 精细陶瓷室温断裂韧性试验方法 表面裂纹弯曲梁（SCF）法

ICS

81.060.30

CCS

Q30

中华人民共和国国家标准

GB/T44537—2024

精细陶瓷室温断裂韧性试验方法

表面裂纹弯曲梁（SCF）法

Testmethodforfracturetoughnessoffineceramicsatroomtemperature—

Surfacecrackinflexure（SCF）method

[ISO18756：2003，Fineceramics（advancedceramics,advancedtechnical

ceramics）—Determinationoffracturetoughnessofmonolithicceramicsatroom

temperaturebythesurfacecrackinflexure（SCF）method,MOD]

2024-09-29发布2025-04-01实施

国家市场监督管理总局发布

国家标准化管理委员会

GB/T44537—2024

目次

前言

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Ⅲ

1

范围

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1

2

规范性引用文件

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1

3

术语和定义

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1

4

符号

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2

5

原理

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3

6

仪器设备

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3

6.1

试验机

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3

6.2

弯曲夹具

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4

6.3

外径测量装置

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4

6.4

硬度计

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4

6.5

显微镜

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5

6.6

染色渗透剂

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5

6.7

温度测量装置

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5

6.8

湿度测量装置

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5

7

样品

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5

7.1

样品尺寸和样品制备

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5

7.2

样品数量

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5

8

试验步骤

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6

8.1

预制裂纹

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6

8.2

样品断裂试验

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8.3

裂纹尺寸测量

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9

8.4

环境影响

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10

8.5

评估R曲线行为（可选）

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10

8.6

参考材料（可选）

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11

9

结果计算

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10

试验报告

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12

附录A（资料性）环境因素影响的慢速裂纹扩展

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13

附录B（规范性）预裂纹的表征

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14

附录C（资料性）用SCF方法进行R曲线行为评价

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19

附录D（规范性）倒角修正

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21

参考文献

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23

Ⅰ

GB/T44537—2024

前言

本文件按照GB/T1.1—2020《标准化工作导则第1部分：标准化文件的结构和起草规则》的规

定起草。

本文件修改采用ISO18756：2003《精细陶瓷（先进陶瓷、先进技术陶瓷）采用表面裂纹弯曲梁

（SCF）法测定精细陶瓷室温断裂韧性》。

本文件与ISO18756：2003的技术差异及原因如下：

—删除了术语“断裂韧性值”，以避免术语混淆不清（见ISO18756：2003中的3.3）；

—将SCF法测得的断裂韧性的符号KIsc更改为KIc,SCF，以方便对断裂韧性术语的理解（见

第4章）；

—用规范性引用的GB/T6569替换了ISO14704，以适应我国技术条件，增加可操作性（见6.2、

7.1.2、7.1.3）；

—增加了对试验报告内容的要求，以增加可操作性，便于本文件的执行[见第10章的a）、b）、

c）、s）]。

本文件做了下列编辑性改动：

—为与现有标准协调，将标准名称改为《精细陶瓷室温断裂韧性试验方法

表面裂纹弯曲梁

（SCF）法》；

—将关于SCF法和单边预裂纹梁法的区别和联系的描述更改为注（见第1章，ISO18756：2003中

的第1章）；

—用资料性引用的GB/T23806替换了ISO15732（见第1章）；

—删除了ISO18756：2003中的第1章的注；

—更改了术语“应力强度因子”的注（见3.1注1，ISO18756：2003中的注）；

—增加了术语“应力强度因子”的注（见3.1注2）；

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

—增加了条标题（见6.1~6.8、8.1.1~8.1.10）；

—用资料性引用的GB/T1216替换了ISO3611（见6.3）；

—删除了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。

请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。

本文件由中国建筑材料联合会提出。

本文件由全国工业陶瓷标准化技术委员会（SAC/TC194）归口。

本文件起草单位：中国科学院上海硅酸盐研究所、广东省科学院新材料研究所、中广核研究院有限

公司、宁波伏尔肯科技股份有限公司、国装新材料技术（江苏）有限公司、济宁市质量计量检验检测研

究院、山东工业陶瓷研究设计院有限公司、山东国瓷功能材料股份有限公司、西安鑫垚陶瓷复合材料股

份有限公司、中国国检测试控股集团股份有限公司、武汉理工大学、新三思（深圳）实验设备有限公

司、北京中天标科标准化技术研究院集团有限公司、东华大学、上海工程技术大学。

本文件主要起草人：王新刚、王小飞、叶云、薛佳祥、袁祥奕、曹艳芬、王铭、崔爽、刘洋、

吴永庆、熊礼俊、刘洁、蒋丹宇、陈常祝、邹冀、万德田、包亦望、胡丽、张海昇、吴利翔、鲍伟超、

吕一航、马小民、李健、杨国银、付颖、张国军、袁建辉、高建华、李蕾。

Ⅲ

GB/T44537—2024

精细陶瓷室温断裂韧性试验方法

表面裂纹弯曲梁（SCF）法

1范围

本文件描述了采用表面裂纹弯曲梁（SCF）法测定精细陶瓷室温断裂韧性的试验方法。

本文件既适用于具有平坦或上升裂纹扩展阻力曲线的材料，也适用于单相陶瓷、晶须（或）颗粒增

强的复相陶瓷材料。

本文件不适用于连续纤维增强的陶瓷基复合材料。

注：本文件的表面裂纹弯曲梁（SCF）法与GB/T23806[2]的单边预裂纹梁法类似，区别是通过不同方法制备预裂

纹，本方法制备的预裂纹尺寸较小。这两种方法对于具有平坦R曲线的材料测试结果相近。

2规范性引用文件

下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。其中，注日期的引用文

件，仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括所有的修改单）适用

于本文件。

GB/T6569精细陶瓷弯曲强度试验方法（GB/T6569—2006，ISO14704：2000，MOD）

GB/T16825.1—2022金属材料静力单轴试验机的检验与校准第1部分：拉力和（或）压力

试验机测力系统的检验与校准（ISO7500﹘1：2018，IDT）

注：ISO18756：2003中规范性引用的ISO7500﹘1：1999已由ISO7500﹘1：2018代替，本文件中被引用的内容无

变化。

3术语和定义

下列术语和定义适用于本文件。

3.1

应力强度因子stressintensityfactor

KI

张开型（Ⅰ型）裂纹尖端区域弹性应力场的大小。

注1：应力强度因子是施加力、样品尺寸、几何形状和裂纹长度的函数。

注2：裂纹按其力学特征分为张开型（Ⅰ型）裂纹、滑开型（Ⅱ型）裂纹和撕开型（Ⅲ型）裂纹，KI表示张开型

（Ⅰ型）应力强度因子。

3.2

断裂韧性fracturetoughness

材料抵抗裂纹扩展的能力。

3.3

预裂纹precrack

断裂试验前在样品上预先引发的一条裂纹。

3.4

裂纹前缘线crackfrontline

裂纹尖端位置的一条线。

1